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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

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The correct Answer is:
D
Mean of five numbers is 30.
Sum of five numbers `= 30 xx 5 =150`
Let the excluded number be x.
Then, mean of four numbers `=(150-x)/(4) = 28`
`rArr 150-x = 112 rArr x=150-122 = 38`
Hence, (d) is the correct answer.
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