RD Sharma Class 10 Solutions Chapter 7 Exercise 7.2 (Updated for 2023)

RD Sharma Class 10 Solutions Chapter 7 Exercise 7.2: Students can use the RD Sharma Class 10 Solutions to get confidence in solving Class 10 Mathematics problems. Download RD Sharma Solutions for Class 10 Maths Chapter 7 Exercise 7.2, PDF, for any clarifications or explanations on this exercise.

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RD Sharma Class 10 Solutions Chapter 7 Exercise 7.2

Access answers to RD Sharma Solutions Class 10 Maths Chapter 7 Exercise 7.2- Important Question with Answers

Question 1.
The. number of telephone calls received at an exchange per interval for 250 successive one-minute intervals is given in the following frequency table:

Compute the mean number of calls per interval.
Solution:
Let assumed mean (A) = 4

Hence the mean number of calls per interval = 3.54

Question 2.
Five coins were simultaneously tossed 1000 times, and at each toss the number of heads was observed. The number of tosses during which 0, 1, 2, 3, 4, and 5 heads were obtained are shown in the table below. Find the mean number of heads per toss

Solution:
Let assumed means (A) = 3

Hence the mean number of tosses per head = 2.47

Question 3.
The following table gives the number of branches and number of plants in the garden of a school.

Calculate the average number of branches per plant.
Solution:
Let assumed mean (A) = 4

∴Mean number of branches per plant = 3.62

Question 4.
The following table gives the number of children of 150 families in a village

Find the average number of children per family.
Solution:
Let assumed mean (A) = 3

= 3 – 0.65 = 2.35
Hence, the mean number of children per family = 2.35

Question 5.
The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below:

Find the average number of marks.
Solution:

Question 6.
The number of students absent in a class was recorded every day for 120 days and the

Solution:
Let assumed mean = 3

= 3 + 0.525 = 3.525 = 3.53 (approx)

Question 7.
In the first proofreading of a book containing 300 pages the following distribution of misprints was obtained:

Find the average number of misprints per page.
Solution:
Let assumed mean (A) = 2

= 2 – 127 = 0.73
∴ Average number of misprints per page = 0.73

Question 8.
The following distribution gives the number of accidents met by 160 workers in a factory during a month.

Find the average number of accidents per worker.
Solution:
Let assumed mean = 2

= 2 – 1.168 = 2 – 1.17 = 0.83 (approx)
∴ Average number of accidents per worker = 0.83

Question 9.
Find the mean from the following frequency distribution of marks at a test in statistics

Solution:
Let assumed mean = 25

∴Average of marks obtained per student = 22.075

We have provided complete details of RD Sharma Class 10 Solutions Chapter 7 Exercise 7.2. If you have any queries related to CBSE Class 10, feel free to ask us in the comment section below.

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