CG Board Class 8 Mathematics Chapter 6 Solutions: Statistics (सांख्यिकी) – 2026-27

CG SCERT (Chhattisgarh Board) Class 8 Mathematics Solutions | 2026-27 Official Edition

Complete 100% textbook-grounded CG Board Class 8 Mathematics Chapter 6 Solutions: Statistics (सांख्यिकी) in Bilingual Format (English & Hindi Medium).


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Question 1

Find the mean 81 74 69 73 91…


📝 Question:

Find the mean: 81, 74, 69, 73, 91, 55, 61

💡 Solution:

Mean =)/)

  • Sum of observations / = 81 + 74 + 69 + 73 + 91 + 55 + 61 = 504
  • Number of observations (N) / = 7
  • Mean = 504/7 = 72

Question 2

Find the mean of the even numbers between…


📝 Question:

Find the mean of the even numbers between 50 and 70

💡 Solution:

  • Even numbers between 50 and 70 / 50 70

52, 54, 56, 58, 60, 62, 64, 66, 68

  • Sum of these numbers / = 52 + 54 + 56 + 58 + 60 + 62 + 64 + 66 + 68 = 540
  • Total count of numbers (N) / = 9
  • Mean = 540/9 = 60

Question 3

Find the median 4 5 10 6 7…


📝 Question:

Find the median: 4, 5, 10, 6, 7, 14, 9, 15

💡 Solution:

  • Arranging the data in ascending order /

4, 5, 6, 7, 9, 10, 14, 15

  • Here, number of terms N = 8.
  • Formula for Even N / :

Median = ((N/2)th term + (N/2 + 1)th term)/(2)

  • N/2th term = 4th term = 7
  • (N/2 + 1)th term = 5th term = 9
  • Median = (7 + 9)/(2) = 16/2 = 8

Question 4

The weight of 11 students in kgs in…


📝 Question:

The weight of 11 students (in kgs) in a class are as follows: 25, 27, 29, 32, 30, 28, 26, 31, 35, 41, 34. Find its median

💡 Solution:

  • Arranging weights in ascending order /

25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 41

  • Here, number of terms N = 11.
  • Formula for Odd N / :

Median = ((N + 1)/(2))th term

  • Median = ((11 + 1)/(2))th term = 6th term
  • The 6th term is 30 kg.

Question 5

In a Science quiz competition one student of…


📝 Question:

In a Science quiz competition, one student of class VIII received the following marks: 83, 61, 48, 73, 76, 52, 67, 61, 79. Find the median of the above marks

💡 Solution:

  • Arranging marks in ascending order /

48, 52, 61, 61, 67, 73, 76, 79, 83

  • Here, number of terms N = 9.
  • Median = ((9 + 1)/(2))th term = 5th term
  • The 5th term is 67.

Question 6

Find the mode of the given data 7…


📝 Question:

Find the mode of the given data: 7, 5, 99, 3, 1, 9, 7, 5, 3, 1, 1, 9, 7, 7, 5, 5, 5, 3, 1, 5, 3, 5, 1, 5, 7, 7, 9, 9, 1

💡 Solution:

  • Mode is the value that occurs most frequently in the given data.
  • Frequency Table / :
  • Number 1 occurs 6 times
  • Number 3 occurs 4 times
  • Number 5 occurs 8 times
  • Number 7 occurs 6 times
  • Number 9 occurs 4 times
  • Number 99 occurs 1 time
  • Since 5 has the maximum frequency (8 times), the Mode = 5. , = 5 )*

Question 7

Find the mode of the given distribution 5…


📝 Question:

Find the mode of the given distribution: 5, 3, 2, 2, 4, 5, 3, 3, 4, 3, 5, 3

💡 Solution:

  • Frequency of numbers / :
  • 2 appears 2 times
  • 3 appears 5 times
  • 4 appears 2 times
  • 5 appears 3 times
  • Number 3 has the highest frequency (5 times). So, Mode = 3. = 3 )*

Question 8

Find the mean of the first five odd…


📝 Question:

Find the mean of the first five odd natural numbers

💡 Solution:

  • First five odd natural numbers /

1, 3, 5, 7, 9

  • Sum / = 1 + 3 + 5 + 7 + 9 = 25
  • Count (N) / = 5
  • Mean = 25/5 = 5

Question 9

The mean of the numbers 8 5 x…


📝 Question:

The mean of the numbers 8, 5, x, 6, 10, 5 is 7. Find the value of x

💡 Solution:

  • Given Mean / = 7
  • Sum of observations / = 8 + 5 + x + 6 + 10 + 5 = 34 + x
  • Number of observations / = 6
  • Using Formula / :

Mean = (Sum)/(Count)

7 = (34 + x)/(6)

7 × 6 = 34 + x

42 = 34 + x

x = 42 – 34 = 8

### *EXERCISE 6.2

Question 1

The marks obtained by Geeta in the monthly…


📝 Question:

The marks obtained by Geeta in the monthly test exams in mathematics for 6 months are as follows: July: 40, August: 45, September: 65, October: 35, Nov.: 55, Dec.: 60 (Out of 100). Construct a pi-chart with the help of the above data. Step-by-Step Calculation of Central Angles / : Total Marks Obtained / = 40 + 45 + 65 + 35 + 55 + 60 = 300 Total Central Angle of a circle / = 360° Formula / : Central Angle = (Marks Obtained)/(Total Marks) × 360°| Month | Marks | Central Angle Calculation | Central Angle | | :— | :—: | :—: | :—: | | July | 40 | 40/300 × 360°| 48° | | August | 45 | 45/300 × 360°| 54° | | September | 65 | 65/300 × 360°| 78° | | October | 35 | 35/300 × 360°| 42° | | November | 55 | 55/300 × 360°| 66° | | December | 60 | 60/300 × 360°| 72° | | Total* | 300 | | 360° |

💡 Solution:

  1. Draw a circle of any convenient radius.
  2. Draw a radius as a starting base line.
  3. Construct sectors corresponding to angles 48°, 54°, 78°, 42°, 66°, and 72°sequentially using a protractor.
  4. Label each sector with the respective month name and marks.

Question 2

The monthly income of a family is Rs…


📝 Question:

The monthly income of a family is Rs. 12,000.00. The expenditure of the family in the month is as follows: House rent: Rs. 1500, Food: Rs. 6000, Education: Rs. 2200, Entertainment: Rs. 800, Health: Rs. 1500. Make a pi-chart of the given data. Step-by-Step Calculation of Central Angles / : Total Monthly Income / = Rs. 12,000 * Total Expenditure / = 1500 + 6000 + 2200 + 800 + 1500 = Rs. 12,000

💡 Solution:

*House Rent1500(1500)/(12000) × 360°45°
*Education2200(2200)/(12000) × 360°66°
*Entertainment800(800)/(12000) × 360°24°
*Health1500(1500)/(12000) × 360°45°
*Total12000360°

Central Angle = (Expenditure)/(Total Income) × 360°| Item | Expenditure in Rs. | Central Angle Calculation | Central Angle |

  1. Draw a circle of convenient radius.
  2. Using a protractor, draw central angles of 45°(House rent), 180°(Food), 66°(Education), 24°(Entertainment), and 45°(Health)., 180°, 66°, 24° 45° )*
  3. Color/shade each sector appropriately to complete the pi-chart.

### *EXERCISE 6.3

Question 1

What will be the probability of drawing a…


📝 Question:

What will be the probability of drawing a card of diamond from a pack of cards?

💡 Solution:

  • Total number of cards in a pack / = 52
  • Number of diamond cards / = 13

Probability =)/)

  • Probability = 13/52 = 1/4

Question 2

A bag has 6 white 11 red 7…


📝 Question:

A bag has 6 white, 11 red & 7 blue balls. Find out the probability of drawing a white ball out of that bag?

💡 Solution:

  • Total number of balls / = 6 + 11 + 7 = 24
  • Number of white balls / = 6
  • Probability of drawing a white ball = 6/24 = 1/4

Question 3

A horse race competition has five competitors Find…


📝 Question:

A horse race competition has five competitors. Find out their possibility of winning the race

💡 Solution:

  • Total competitors / = 5
  • Favorable outcome for one competitor to win / = 1
  • Probability of winning = 1/5

Question 4

In a basket there are 10 apples 8…


📝 Question:

In a basket there are 10 apples, 8 pomegranates (Anar) and 12 guavas. What will be the probability of taking out apples from the basket?

💡 Solution:

  • Total number of fruits / = 10 + 8 + 12 = 30
  • Number of apples / = 10
  • Probability of drawing an apple = 10/30 = 1/3

Question 5

Find out the probability of appearance of an…


📝 Question:

Find out the probability of appearance of an even number when a die is rolled

💡 Solution:

  • Total outcomes on rolling a die / = {1, 2, 3, 4, 5, 6} ⇒ 6
  • Even numbers / = {2, 4, 6} ⇒ 3
  • Probability of an even number = 3/6 = 1/2

Question 6

On tossing a coin what will be the…


📝 Question:

On tossing a coin, what will be the possibility of appearance of head and the appearance of tail for that coin?

💡 Solution:

  • Total outcomes on tossing a coin / = 2
  • Favorable outcome for Head / = 1
  • Favorable outcome for Tail / = 1
  • Probability of Head = 1/2
  • Probability of Tail = 1/2


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