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Question

If 5 and 2 are the Arithmetic Mean and Harmonic Mean of two distinct numbers, then their Geometric Mean is

A
3
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B
7
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C
10
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D
10
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Solution

The correct option is C 10
Given,
AM of two numbers =5, HM of two numbers =2.
By using the formula,
AM×HM=GM2
5×2=GM2
GM2=10
GM=10.
Hence, option C is correct.

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