If $$\left( {\sqrt a + \sqrt b } \right)$$ = 15 and $$\left( {\sqrt a

Question

If $$\left( {\sqrt a + \sqrt b } \right)$$ = 15 and $$\left( {\sqrt a - \sqrt b } \right)$$ = 3, then the value of $$\frac{{\sqrt {ab} }}{4}$$ is?

Options:

A . 6

B . 7

C . $$\frac{{27}}{2}$$

D . 5

Answer: Option C

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