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From a set \(A = [3, \sqrt{2}, 2\sqrt{3}, \sqrt{9}, \sqrt{7}...

From a set $A = [3, \sqrt{2}, 2\sqrt{3}, \sqrt{9}, \sqrt{7}]$ , a number is selected at random. Find the probability that is a rational number

A.

$\frac{1}{5}$

B.

$\frac{2}{5}$

C.

$\frac{3}{5}$

D.

$\frac{4}{5}$

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Correct answer is B

$A = {3, \sqrt{2}, 2\sqrt{3}, \sqrt{9}, \sqrt{7}}$

n(A) = 5

Let the rational nos = R

n(R) = 2 (3, $\sqrt{9}$ )

P(R) = 2/5

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