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The mean of five numbers is 30. If one n...

The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is

A

28

B

30

C

35

D

38

Text Solution

Verified by Experts

The correct Answer is:
D
Mean of 5 numbers = 30
`therefore" Total sum of 5 numbers "=30xx5=150`
After excluded one number
Mean of 4 numbers will be = 28
`therefore" Total sum of 4 numbers "=4xx28=112`
Thus, excluded number
`=("sum of numbers "-" sum of 4 numbers")`
`=150-112=38`
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