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Question

The average of five numbers is 56. If the average of first four numbers is 54, what is the value of the fifth number?

A
68
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B
72
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C
56
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D
64
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E
None of these
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Solution

The correct option is D 64

Here, total sum of five numbers = 56 × 5 = 280
Sum of first four numbers = 4 × 54
= 216
Value of fifth number = 280 - 216
= 64


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