The mean of six numbers is 23 If one of the numbers is excluded the mean of the remaining numbers is...

Question

The mean of six numbers is 23 If one of the numbers is excluded the mean of the remaining numbers is 20 Find the excluded number

Accepted Answer

It is given that Mean of six numbers 23 So we get the sum of six numbers 23 6 138 It is given that Mean of five numbers 20 So we get the sum of five numbers 20 5 100 We know that Excluded number sum of six numbers sum of five numbers By substituting the values Excluded number 138 100 38 Therefore the excluded number is 38

RS Aggarwal Solutions Class 9 Mathematics Solutions for Mean Median And Mode Of Ungrouped Data Exercise 18A in Chapter 18 - Mean Median And Mode Of Ungrouped Data