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Mean

If A.M. and G...

Question

If A.M. and G.M. of two numbers is 10 & 8 respectively, then find their H.M.

6.4

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5.6

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1.56

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1.64

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Solution

The correct option is A 6.4
$G . M = (A . M \times H . M)^{\frac{1}{2}}$
$64 = 10 \times H . M$
$H . M = 6.4$

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