Which of the following is irrational?

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Question

(a) $\sqrt{\frac{4}{9}}=\frac{3}{2},$ which is a rational number.

(b) $\frac{\sqrt{12}}{\sqrt{3}}=\frac{\sqrt{4 	imes 3}}{\sqrt{3}}=\frac{2 \sqrt{

Vedclass · Accepted Answer

$\sqrt{7}$

Vedclass · Answer

(a) $\sqrt{\frac{4}{9}}=\frac{3}{2},$ which is a rational number.

(b) $\frac{\sqrt{12}}{\sqrt{3}}=\frac{\sqrt{4 	imes 3}}{\sqrt{3}}=\frac{2 \sqrt{3}}{\sqrt{3}}=2,$ Which is a rational number.

(c) $\sqrt{7}$ is a rational number.

(d) $\sqrt{81}=9,$ which is a rational number.

Hence, $( C )$ is the correct answer.

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