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Question

Let the average of prime number be $P$ and average of composit number be $C.$ Again the number of prime number be $x$, then the number of composite nu

Vedclass · Accepted Answer

$\frac{7}{13}$

Vedclass · Answer

Let the average of prime number be $P$ and average of composit number be $C.$ Again the number of prime number be $x$, then the number of composite number be $2 x$

$\frac{P x+2 C x}{3 x}=9 \Rightarrow P+2 C=27$

$\frac{2 P x+C x}{3 x}=11 \Rightarrow 2 P+C=33$

On adding eq. (i) and (ii)

we get $P+C=20$ and on Subtracting eq. (i) from (ii)

we get $P-C=6$

Therefore $P=13$ and $C=7 \Rightarrow$ thus $=\frac{C}{P}=\frac{7}{13}$

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