Question

the mean of 5 numbers is 20 if one of the number is excluded mean of the remaining number becomes 23 find the excluded number please give the answer​

Answer 1

Answer:

Excluded number is 8

Step-by-step explanation:

Mean of 5 numbers is 20

Total sum of the all the numbers = 5 x 20 = 100

if one of the number is excluded mean of the remaining number becomes 23

i,e Mean of 4 numbers is 23

Total sum of 4 numbers = 4 x 23 = 92

Excluded number = Initial sum of 5 numbers - Final sum of 4 numbers

= 100-92

= 8

Excluded number is 8

Answer 2

Given,

The mean of 5 numbers = 20

So, the total sum of the numbers = 20 x 5 = 100

After excluding one number,

The mean of the remaining 4 numbers = 23

So, the total sum of these numbers = 23 x 4 = 92

Hence,

The excluded number is = 100 – 92 = 8.