NCERT Solutions for Class 11 Maths Chapter 15 Exercise 15.3 Statistics updated for new academic session 2022-2023 in English and Hindi Medium.

• ## Class 11 Maths Exercise 15.3 Solutions in Hindi and English Medium

### NCERT Solutions for Class 11 Maths Exercise 15.3

 Class: 11 Mathematics Chapter: 15 Exercise: 15.3 Topic: Statistics Content Mode: Text and Videos Medium: Dual Language – Hindi, English

### About Class 11 Maths Exercise 15.3

Grade 11 Mathematics exercise 15.3 contains only five questions and three examples. The questions are about the application of co-efficient of variation. The formula of C.V. (co-efficient of variation) is (C.V.) = (Standard Deviation)/MeanÃ—100. Let us take an interesting example.

There are two batsmen Sachin Tendulkar and Virender Sehwag. Suppose we are required to choose one of them for a test match. Naturally, as captain anybody would like to choose a player with greater consistency and lesser variation. Said in other words, the batman with lesser degree of co variation will be chosen. Recollect the co variation is expressed as percentage.

#### Examples of Exercise 15.3 in 11th Maths

For two series having equal means the series with greater standard deviation/ variance shall have higher degree of variance. The variables will be highly dispersed in such a series. Example 13 is a direct question in this regard. Whereas in example 14 we are required to find the arithmetic mean given the C.V. Thus, example 14 of NCERT textbook is indirect question.