# NCERT Solutions for Class 11 Maths Chapter 15 Statistics

## NCERT Solutions Class 11 Maths Chapter 15 Statistics PDF

NCERT Solutions for Class 11 Maths Chapter 15, "Statistics," are highly beneficial for completing homework. These solutions for all exercises have been carefully prepared by experienced teachers at www.manabadi.co.in.

Download free NCERT Solutions for Class 11 Maths Chapter 15: Statistics (Exercises 15.1, 15.2, 15.3, and Miscellaneous) in both Hindi and English mediums. These solutions are available for CBSE students as well as those from Uttarakhand, Bihar, MP Board, Gujarat Board, BIE, Intermediate, and UP Board who are following NCERT books based on the updated CBSE syllabus for the 2024-25 session.

## NCERT Solutions for Class 11Maths chapter 15 Exercise 15.1

### EX 15.1 Class 11 Maths Question 1:

4, 7, 8, 9, 10, 12, 13, 17

**Solution:**

Mean of the given data is

### EX 15.1 Class 11 Maths Question 2:

38, 70, 48, 40, 42, 55, 63, 46, 54, 44

**Solution:**

Mean of the given data is

### EX 15.1 Class 11 Maths Question 3:

13, 17, 16, 14, 11, 13, 10, 16, 11, 18, 12, 17

**Solution:**

Arrranging the data in ascending order, we have

10, 11, 11, 12, 13, 13, 14, 16, 16, 17, 17, 18

Here n = 12 (which is even)

So median is the average of 6thand 7th observations

## NCERT Solutions for Class 11Maths chapter 15 Exercise 15.2

### EX 15.2 Class 11 Maths Question 1:

6, 7, 10, 12, 13, 4, 8, 12

**Solution:**

Here x_{i } = 6, 7, 10, 12, 13, 4, 8, 12

### EX 15.2 Class 11 Maths Question 2:

First n natural numbers

**Solution:**

Here x_{i } = 1, 2, 3, 4,..........n

### EX 15.2 Class 11 Maths Question 3:

First 10 multiples of 3

**Solution:**

Here x_{i } = 3, 6, 9, 12, 15, 18, 21, 27, 30,

## NCERT Solutions for Class 11Maths chapter 15 Exercise 15.3

### EX 15.3 Class 11 Maths Question 1:

From the data given below state which group is more variable, A or B?

### EX 15.3 Class 11 Maths Question 2:

From the prices of shares X and Y below, find out which is more stable in value:

## Class 11 Maths NCERT Solutions - Miscellaneou Questions

### Miscellaneous Exercise Clss 11 Maths Question 1:

The mean and variance of eight observations are 9 and 9.25, respectively. If six of the observations are 6, 7, 10, 12, 12 and 13, find the remaining two observations.

**Ans:**

Let the remaining two observations be x and y.

Therefore, the observations are 6, 7, 10, 12, 12, 13, ,x y.

### Miscellaneous Exercise Clss 11 Maths Question 2:

The mean and variance of 7 observations are 8 and 16, respectively. If five of the observations are 2, 4, 10, 12 and 14. find the remaining two observations.

**Ans:**

Let the remaining two observations be x and y.

Therefore, the observations are 2, 4, 10, 12, 14, ,x y.