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Question

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

A
28
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B
30
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C
35
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D
38
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Solution

The correct option is C 38
The mean of 5 numbers =30
The sum of 5 numbers is =30×5=150
After excluding a number say, x
Mean =28
Sum of four numbers =28×4=112
x=150112=38

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