Question

the mean of 5 numbers is 20 if one number is excluded mean of the remaining number becomes 23 find the excluded number

Answer 1

mean of 5 numbers = 20

Sum of 5 numbers = 20×5 = 100

if one is excluded, mean of 4 numbers = 23

Sum of 4 numbers = 23×4= 92

The number excluded= 100 - 92 = 8

Answer 2

ANSWER...................,

The mean of 5 number = 20

The sum of 5 number = 5 × 20 = 100

If one number is excluded ,

Then mean of 4 number = 23

Sum of 4 number = 4 × 23 = 92

∴excluded number = 100 - 92 = 8