Samacheer Kalvi 8th Social Science Guide Geography Chapter 5 Hazards

Tamilnadu State Board New Syllabus Samacheer Kalvi 8th Social Science Guide Pdf Geography Chapter 5 v Text Book Back Questions and Answers, Important Questions, Notes.

Tamilnadu Samacheer Kalvi 8th Social Science Solutions Geography Chapter 5 Hazards

Samacheer Kalvi 8th Social Science Hazards Text Book Back Questions and Answers

Percentage Off Calculator is a free online tool that displays the percentage off of the product.

I. Choose the correct answer.
1. ………………. percentage of nitrogen is present in the air.
a) 78.09%
b) 74.08%
c) 80.07%
d) 76.63%
Answer:
a) 78.09%

2. Tsunami in the Indian Ocean took place in the year ………………. .
a) 1990
b) 2004
c) 2005
d) 2008
Answer:
b) 2004

3. The word tsunami is derived from ………………. language.
a) Hindi
b) French
c) Japanese
d) German
Answer:
c) Japanese

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

4. The example of surface water is
a) Artesian well
b) Groundwater
c) Subsurface water
d) Lake
Answer:
d) Lake

5. Event that occurs due to the failure of monsoons.
a) Condensation
b) Drought
c) Evaporation
d) Precipitation
Answer:
b) Drought

II. Fill in the blanks.

1. Hazards may lead to …………….
Answer:
affect the community most severely

2. Landslide is an example of …………… hazard.
Answer:
geologic

3. On the basis of origin, the hazard can be grouped into …………… categories.
Answer:
8 (or) eight

4. Terrorism is an example of …………… hazard.
Answer:
human-induced

5. Oxides of nitrogen are …………… pollutants which affect human beings.
Answer:
primary

6. Chernobyl nuclear accident took place in
Answer:
26th April 1986

III. Match the following.

List I List II
1. Primary pollutant a. Terrorism
2. Hazardous waste b. Tsunami
3. Earthquake c. Outdated drugs
4. Meteorological drought d. Oxides of sulphur
5. Human induced hazard e. Reduction in rainfall

Answer:

List I List II
1. Primary pollutant d. Oxides of sulphur
2. Hazardous waste c. Outdated drugs
3. Earthquake b. Tsunami
4. Meteorological drought e. Reduction in rainfall
5. Human induced hazard a. Terrorism

IV. Answer in brief.
1. Define ‘hazard’?
Answer:
‘Hazards are defined as a thing, person, event or factor that poses a threat to people, structures or economic assets and which may cause a disaster.’

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

2. What are the major types of hazards?
Answer:

  • Natural hazards
  • Human-made hazards
  • Socio-natural hazards

3. Write a brief note on hazardous wastes.
Answer:
The wastes that may or tend to cause adverse health effects on the ecosystem and human beings are called hazardous wastes.

4. List out the major flood-prone areas of our country.
Answer:
Punjab, West Bengal, Odisha are the region which is also prone to flood often.

5. Mention the types of drought.
Answer:
Drought could be classified into three types. They are:

  1. Meteorological drought
  2. Hydrological drought
  3. Agricultural drought

6. Why should not we construct houses in foothill areas?
Answer:
Because of the presence of steep slopes and heavy rainfall we should not construct houses at the foothills areas.

V. Distinguish the following.
1. Hazards and disasters.

Hazards Disasters
Hazards occur frequently and threaten people. It is a hazardous event that occurs over a limited time span.
Ex: Natural hazards, Earthquake. Ex: Flood

2. Natural hazards and human-made hazards.

Natural hazard Human-made hazard
Man has no role to play in such hazards. These are caused by the undesirable activities of humans.
Ex: Flood, drought, etc. Ex: Pollution of air and water

3. Flood and drought.

Flood Drought
It occurs through heavy rainfall. It occurs through no rainfall.
It is often held in the coastal Andhra Pradesh & Odisha. The dry region has seen in the leeward side of Western ghats.

4. Earthquake and tsunami.

Earthquake Tsunami
The violent tremor of the earth’s crust is called an Earthquake. Tsunami refers to huge ocean waves caused by landslides.
The study of earthquakes is called Seismograph. The study of the Tsunami is called Oceanography.

VI. Answer in a paragraph.
1. Write an essay on air pollution.
Answer:
Pollution of Air:

  1. Air is a mixture of several gases.
  2. The main gases are nitrogen (78.09%) for forming products such as fertilizers for plants and for making the air inert, oxygen (20.95%) for breathing and carbon dioxide (0.03%) for photosynthesis.
  3. Some other gases like argon, neon, helium, krypton, hydrogen, zenon and methane are also present.
  4. Air pollution is the contamination of indoor or outdoor air by a range of gases. Air pollution can be categorized into primary and secondary pollutants.
  5. A primary pollutant is an air pollutant emitted directly from a source.
  6. A secondary pollutant is not directly emitted.
  7. Primary pollutants are as follows:
    • Oxides of Sulphur
    • Oxides of Nitrogen
    • Oxides of Carbon
    • Particulate Matter and
    • Other primary pollutants
  8. Secondary pollutants are as follows:
    • Ground Level Ozone
    • Smog

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

2. Define earthquake and list out its effects.
Answer:
Earthquakes:

  • Earthquake is a violent tremor in the earth’s crust, sending out a series of shock waves in all directions from its place of origin.
  • Earthquake-prone regions of the country have been identified on the basis of scientific inputs relating to seismicity, earthquakes that occurred in the past, and the tectonic setup of the region.
  • Based on these inputs, the Bureau of Indian Standards has grouped the country into four seismic zones: Zone II, Zone III, Zone IV, and Zone V (No area of India is classified as Zone I).
    Seismic Zones Level of Risk
    Zone V Very High
    Zone IV High
    Zone III Moderate
    Zone II Low

3. Give a detailed explanation of the causes of landslides.
Answer:

1. Landslide is a rapid downward movement of rock, soil, and vegetation down the slope under the influence of gravity.

2. The causes of landslides are wide-ranging, They have two aspects in common.

3. Force of gravity and

4. Failure of Soil

5. Landslides are considered of two types. They are:

  • Naturally occurring disaster.
  • Human-induced changes in the environment.

6. Natural causes of landslides are:

  • Climatic changes
  • Seismic activities
  • Weathering
  • Soil erosion
  • Forest fires
  • Gravity and
  • Volcanic eruption

7. Human causes of landslides include deforestation mining, construction of roads, and railways over the mountain.

4. Elaborately discuss the effects of water pollution.
Answer:

  • It may cause a harmful effect on any living thing that drinks or uses or lives in it.
  • It may be defined as alternation in the physical, chemical, and biological characteristics of water, which may cause harmful effects in human and aquatic life.

The major causes of water pollution in India are:

  • Urbanisation
  • Industrial effluents
  • Sewages etc.
  • Agricultural runoff and improper agricultural practices
  • Seawater intrusion
  • Solid wastes

Samacheer Kalvi 8th Social Science Hazards Additional Important Questions and Answers

I. Choose the correct answer.
1. The content of Oxygen in the air is …………….
a) 20.95%
b) 21.95%
c) 22.95%
d) 23.95%
Answer:
a) 20.95%

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

2. The word ‘hazard’ Originated from the ……………. language.
a) French
b) Telugu
c) Malayalam
d) Kannada
Answer:
a) French

3. National Institute of Disaster Management located in ……………..
a) Britain
b) New Delhi
c) France
d) Japan
Answer:
b) New Delhi

4. In Tamil Nadu ……………. coastal districts are frequently affected by Storm Surges.
a) 13
b) 14
c) 15
d) 16
Answer:
a) 13

5. The areas that receive an annual rainfall of less than ……………. are the drought zone regions of India.
a) 60 cm
b) 50 cm
c) 40 cm
d) 45 cm
Answer:
a) 60 cm

6. The meaning of Tsunami is ……………..
a) Wave
b) Harbour wave
c) Storm
d) Storm wave
Answer:
b) Harbour wave

7. In ……………. the Ukraine part of Exclusion Zone was declared as a radiogical and environmental biosphere.
a) 2013
b) 2014
c) 2015
d)2016
Answer:
d) 2016

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

8. In India about ……………. of the land mass is prone to landslide hazard.
a) 15%
b) 18%
c) 19%
d) 20%
Answer:
a) 15%

9. In Trophical Cyclones the wind Speed may reach upto ……………. per hour.
a) 200 km
b) 100 km
c) 300 km
d) 400 km
Answer:
a) 200 km

10. High-Pressure Zone is mentioned in the Geographical map as ……………. letter.
a) L
b) P
c) H
d) S
Answer:
c) H

II. Fill in the blanks.
1. The meaning of hazard is ………………..
Answer:
a game of dice

2. ………………. may be worsened by the destruction of mangroves.
Answer:
Storm Surge hazard

3. ………………. is a violent tremor in the earth’s crust.
Answer:
Earthquake

4. ………………. is a strong wind circulating around a low-pressure area in the atmosphere.
Answer:
Cyclonic Storm

5. During Cyclonic the wind speed may reach upto …………. km and rainfall may record up to …………… cm.
Answer:
200, 50

6. A sudden rise of sea water due to trophical cyclone is called ………………..
Answer:
Storm Surge

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

7. ………………. and ………………. are the major causes of landslides.
Answer:
Steep slope, heavy rainfall

8. In Tamil Nadu ………………. and ………………. are frequently affected by landslides.
Answer:
Kodaikanal, Ooty

9. The gas used for Photosynthesis is ………………..
Answer:
Carbon dioxide

10. A ………………. pollutant is an air pollutant emitted directly from a Source.
Answer:
Primary

11. ………………. may be defined by alteration is the physical, chemical, and biological characteristics of water.
Answer:
Water Pollution

12. In India ………………. is perhaps the most critical components in Managing Disasters.
Answer:
prevention

13. Example for Biological hazard is ………………..
Answer:
Chicken Box

14. ………………., ………………. are Human-made hazards.
Answer:
Explosions, hazardous waste

15. Primary Pollutant example ………………..
Answer:
oxides of Sulphur

III. Match the following.

1. Geological hazard a) Floods, Coastal erosion
2. Hydrologic hazard b) Eruptions and Lava flows
3. Volcanic hazard c) Chickenpox, Smallpox
4. Environmental hazard d) Earthquakes, Tsunami
5. Biological hazard e) Soil, air

Answer:

1. Geological hazard d) Earthquakes, Tsunami
2. Hydrologic hazard a) Floods, Coastal erosion
3. Volcanic hazard b) Eruptions and Lava flows
4. Environmental hazard e) Soil, air
5. Biological hazard c) Chickenpox, Smallpox

IV. State whether the following statements are true or false.
1. Tsunami means Stormy Surge.
Answer:
False

2. A Secondary Pollutant is not directly emitted.
Answer:
True

V. Assertion and Reasons.
1. Assertion: Landslides are generally Sudden and infrequent.
Reason: The presence of Sleep Slope and heavy rainfall are the major causes of landslides.
a) A is correct but R is incorrect
b) Both A and R are incorrect
c) A is incorrect and R is correct
d) Both A and R are correct
Answer:
d) Both A and R are correct

VI. Answer in brief.
1. Define Catastrophe.
Answer:
A catastrophe is a massive disaster that requires a significant expenditure of money and a long time for recovery.

2. What are the major causes of floods?
Answer:
The major causes of floods are:
Meteorological factors

  • Heavy rainfall
  • Tropical cyclones
  • Cloudburst Physical factors
  • Large catchment area
  • Inadequate drainage arrangement

Human factors

  • Deforestation
  • Siltation
  • Faulty agricultural practices
  • Faulty irrigation practices
  • Collapse of dams
  • Accelerated urbanisation.

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

3. Write short notes on Indian Ocean Tsunami?
Answer:

  • On December 26, 2004, at 7:59 a.m. local time, an undersea earthquake with a magnitude of 9.1 struck off the coast of the Indonesian island of Sumatra.
  • The tsunami killed at least 2,25,000 people across a dozen countries, with Indonesia, Sri Lanka, India, Thailand, Somalia and Maldives, sustaining massive damage.

4. Explain Prevention Measures.
Answer:
Prevention is defined as the activities taken to prevent a natural calamity or potential hazard from having harmful effects on either people or economic assets.

VII. Distinguish the following.
1. Geologic hazard and Environmental hazard.

Geologic hazard Environmental hazard
Earthquakes, Tsunami, Landslide and Land subsidence. Pollution of soil/ air/water, Desertification, Global warming and Deforestation.

VIII. Answer in a paragraph.
1. Explain about Socio – natural hazards.
Answer:
Socio-natural hazards:
These are caused by the combined effect of natural forces and misdeeds of human. Some of the examples are:

  • The frequency and intensity of floods and droughts may increase due to indiscriminate felling of trees, particularly in the catchment areas of the rivers.
  • Landslides are caused by natural forces and their frequency, and impact may be aggravated as a result of construction of roads, houses etc., in mountainous areas, excavating tunnels and by mining and quarrying.
  • Storm surge hazards may be worsened by the destruction of mangroves.
  • Smog is a serious problem in most big urban areas. The emissions from vehicles and industries, combustion of wood and coal together combined with fog leads to smog.

2. Explain the Hazards based on their origin.
Answer:
Hazards can be grouped into eight categories
1. Atmospheric hazard:
Tropical storms, Thunderstorms, Lightning, Tornadoes, Avalanches, Heat waves, Fog and Forest fire.

2. Geologic/Seismic hazard:
Earthquakes, Tsunami, Landslide and Land subsidence.

3. Hydrologic hazard:
Floods, Droughts, Coastal erosion and Storm surges.

4. Volcanic hazard:
Eruptions and Lava flows.

Samacheer Kalvi 9th Social Science Guide Geography Chapter 7 Mapping Skills

5. Environmental hazard:
Pollution of soil/ air/water, Desertification, Global warming and Deforestation.

6. Biological hazard:
Chickenpox, Smallpox, AIDS [HIV] and Killer bees.

7. Technological hazard:
Hazardous material incidents, Fires, Infrastructure failures [Bridges, Tunnels, Dams, Nuclear and Radiological accidents].

8. Human-induced hazard:
Terrorism, Bomb blast, War, Transportation accidents and Civil disorder.

Samacheer Kalvi 8th English Guide Supplementary Chapter 1 The Woman on Platform 8

Tamilnadu State Board New Syllabus Samacheer Kalvi 8th English Guide Pdf Supplementary Chapter 1 The Woman on Platform 8 Text Book Back Questions and Answers, Summary, Notes.

Tamilnadu Samacheer Kalvi 8th English Solutions Supplementary Chapter 1 The Woman on Platform 8

8th English Guide The Woman on Platform 8 Text book Back Questions and Answers

8th English Guide The Woman on Platform 8 Textual Exercise Questions and Answers

A. Choose the best answer. (Text Book Page No. 31)

1. Satish’s mother handed to her son …………….
a) bag of pencil
b) bag of vegetables
c) big box of chocolates
d) cricket ball
Answer:
c) big box of chocolates

Samacheer Kalvi 9th English Guide Prose Chapter 2 I Can’t Climb Trees Anymore

2. The train would come at …………….
a) one o’clock
b) twelve o’clock
c) two o’clock
d) eleven o’clock
Answer:
b) twelve O’clock

Age calculator is online tool to calculate age from date of birth to current date. It can also be used to calculate time difference between two dates.

3. The strange lady gave ……………. to Arun.
a) coffee and vada
b) tea and bajji
c) samosas and jalebis
d) black tea and cake
Answer:
c) samosas and jalebis

4. Arun was sitting on platform ……………. .
a) no. 7
b) no. 8
c) no. 4
d) no. 3
Answer:
b) no. 8

Samacheer Kalvi 9th English Guide Prose Chapter 2 I Can’t Climb Trees Anymore

5. Satish and Arun were ……………. years old boys.
a) 12
b) 11
c) 13
d) 10
Answer:
a) 12

B. Match the following. (Text Book Page No. 32)

1. woman in white mother of Satish
2. train boy of same age
3. bowler dressed simply
4. Satish waves of stream
5. spectacles Arun

Answer:

1. woman in white dressed simply
2. train waves of stream
3. bowler Arun
4. Satish boy of same age
5. spectacles mother of Satish

C. Identify the character.

1. I am glad to know that.
Answer:
Mother of Satish

2. Are you all alone, my son?
Answer:
strange lady

3. Yes, I am going to school.
Answer:
Arun

Samacheer Kalvi 9th English Guide Prose Chapter 2 I Can’t Climb Trees Anymore

4. He is one of my friends.
Answer:
Satish

5. Goodbye mother.
Answer:
Arun

D. Answer the following questions.

1. Where was arun sitting?
Answer:
Arun was sitting on platform no. 8 at Ambala station.

2. What was the expected time of train’s arrival?
Answer:
The train would arrive at the midnight.

3. What was the sight Arun had seen on the platform?
Answer:
Arun saw a tide of people, the cries of various vendors and the newspaper boy.

Samacheer Kalvi 9th English Guide Prose Chapter 2 I Can’t Climb Trees Anymore

4. What did the vendors sell?
Answer:
The vendors were selling curds and lemon, the sweet meet, the newspaper.

5. How did the woman appear?
Answer:
The woman had a pale face and dark kind eyes. She wore no jewels and was dressed very simply in a white saree.

6. Where was Arun travelling to?
Answer:
Arun was traveling to his boarding school.

7. What did the woman buy for him?
Answer:
The woman bought samosas and jalebis. She also ordered tea for Arun.

8. What was the advice of Sathish’s mother?
Answer:
The mother of Sathish advised him not to talk to the strangers.

Samacheer Kalvi 9th English Guide Prose Chapter 2 I Can’t Climb Trees Anymore

9. What were Arun’s last words?
Answer:
Aruns last words were “Goodbye – mother”.

10. What was the reaction of the woman at the end?
Answer:
The strange woman held the hand of Arun and she smiled in a gentle understanding way.

Step to Success (Text Book Page No. 33)

Sentence Rearrangement Common Example:
A. Miss Sullivan arrived at the Keller home when Helen was seven.
B. The deaf and blind Helen learned to communicate verbally.
C. But, eventually, Miss Sullivan’s effort was rewarded.
D. Before Helen Keller was two years old, she lost her sight and her hearing.
E. Miss Sullivan worked closely with Helen, her new student.
F. At times the teacher became frustrated.
a) DEFACB
b) DAEFCB
c) ACFDEB
d) CFDABE
e) FDACEB
Answer:
b) DAEFCB

Connecting to Self (Text Book Page No. 33)

Think you are in the following situation and write what would you do and why?

Samacheer Kalvi 8th English Guide Supplementary Chapter 1 The Envious Neighbour 1
Will you ignore/take and give to its owner/ take and keep it yourself.
Answer:
I will take the purse and give it to the owner of the purse. It is the duty of an honest citizen.

Samacheer Kalvi 8th English Guide Supplementary Chapter 1 The Envious Neighbour 2
Will you ignore/go and help him/ stand watching him feeling shy to help
Answer:
I will go and help him. I will try to free him of heavy luggage. I will also help him in carrying his heavy luggage.

Samacheer Kalvi 8th English Guide Supplementary Chapter 1 The Envious Neighbour 3
Will you ignore/try to stop them fighting/be afraid and go away from there.
Answer:
I will try to stop them from fighting. If I am not able to stop them, I will inform the police.

The Woman on Platform 8 Summary in English

A schoolboy waits on platform no. 8 at Ambala station for the train. He meets a stranger. A dignified but simply dressed woman. She is kind to the boy and gets him tiffin. She gives him company till he gets into the train. Though she is a stranger she introduces herself to be the mother of Arun, to the mother of Sathish. Sathish is the classmate of Arun. Aran, the schoolboy bids farewell to the stranger with a loving kiss. He watches her till she is lost in the crowd.

The Woman on Platform 8 Summary in Tamil

பள்ளியில் படிக்கும் பையன் அருண், அம்பாலா ரயில் நிலையத்தில் நடைமேடை 8இல் ரயிலுக்கு காத்து இருக்கிறான். ஒரு புதிய பெண்ணைச் சந்திக்கிறான். அன்பான அந்தப் பெண், பையனை அழைத்துச் சென்று உணவளிக்கிறாள். ரயில் வரும் வரை அவன் பக்கத்தில் அமர்ந்து பேச்சுத் துணையாய் இருக்கிறாள். சதீஷ், அருணின் வகுப்புத் தோழன் தன் அம்மாவுடன் வரும்போது அந்தப் பெண் தன்னை அருணின் அம்மா என்று அறிமுகப்படுத்திக் கொள்கிறாள். அருண் மனம் இளகுகிறது. அந்தப் புதிய பெண்ணை முத்தமிட்டு தன் அன்பை வெளிப்படுத்துகிறான். அவள் கூட்டத்தில் மறையும்வரை அந்தப் பெண்ணையே உற்றுநோக்குகிறான்.

The Woman on Platform 8 About the Author in English
The Envious Neighbour About the Author

Ruskin Bond, short story writer, novelist, and poet, the favourite writer of Indian children. His first novel, Room on the Roof, was published when he was still in his teens. This novel won him the John Rhys Memorial Award in 1957. He also writes about children and the simple hill folk of Uttarakhand. Simplicity and fluency of language and an insight into human nature are hallmarks of his style. His major writings include An Island of Trees, A Bond with the Mountains and The India I Love. He has also been honoured with the Sahitya Akademi Award for his contribution to Indian literature.

The Woman on Platform 8 About the Author in Tamil

ரஸ்கின் பான்ட், சிறுகதை எழுத்தாளர், நாவலாசிரியர், கவிஞர், இந்திய குழந்தைகளின் அபிமான எழுத்தாளர். கூரையின் மேல் உள்ள அறை அவரது முதல் புத்தகம். இப்புத்தகம் அவர் சிறுவனாய் இருக்கும்போதே எழுதப்பட்டது. இப்புத்தகம் 1957இல் ஜான்ரிஸ் மெமோரியல் பரிசு பெற்றது. உத்தரகாண்ட் மலைமீது உள்ள எளிய மக்களின் குழந்தைகள் பற்றி எழுதுபவர். எளிமை, வளமை, ஆத்மாவை ஊடுறுவும் பார்வை இவையே இவரது முத்திரைகள். மரங்களின் தீவு, மலைகளோடு பிணைப்பு, நான் விரும்பும் இந்தியா (An Island of Trees, A Bond with the Mountains, The India I Love) இவையே அவரது முதன்மையான புத்தகங்கள். இந்திய இலக்கியத்திற்கான சாகித்ய அகாடமி பரிசு அவரது படைப்புகளுக்கு அளிக்கப்பட்டுள்ளது.

Samacheer Kalvi 10th Maths Guide Book Back Answers Solutions

Subject Matter Experts at SamacheerKalvi.Guide have created Tamil Nadu State Board Samacheer Kalvi 10th Maths Book Answers Solutions Guide Pdf Free Download in English Medium and Tamil Medium are part of Samacheer Kalvi 10th Books Solutions.

Let us look at these TN State Board New Syllabus Samacheer Kalvi 10th Std Maths Guide Pdf of Text Book Back Questions and Answers Term 1, 2, 3, Chapter Wise Important Questions, Study Material, Question Bank, Notes, Formulas and revise our understanding of the subject.

Students can also read Tamil Nadu Samacheer Kalvi 10th Maths Model Question Papers 2020-2021 English & Tamil Medium.

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Tamilnadu State Board Samacheer Kalvi 10th Maths Book Back Answers Solutions Guide Term 1, 2, 3.

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Samacheer Kalvi 10th Maths Book with Answers Chapter 1 Relations and Functions

Samacheer Kalvi 10th Maths Book Solutions Chapter 2 Numbers and Sequences

TN 10th Maths Guide Samacheer Kalvi Pdf Free Download Chapter 3 Algebra

Samacheer Kalvi 10th Maths Guide Pdf Free Download Chapter 4 Geometry

Tamilnadu Board Class 10 Maths Chapter 5 Coordinate Geometry

Tamil Nadu State Board 10th Std Maths Chapter 6 Trigonometry

10th Samacheer Kalvi Maths Chapter Wise Questions Chapter 7 Mensuration

Samacheer Kalvi 10th Maths Important Questions Chapter 8 Statistics and Probability

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