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 C38 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=150−112=38