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

From a set A=[3,2,23,9,7], a number is selected at random. Find the probability that is a rational number

A.

15

B.

25

C.

35

D.

45

Correct answer is B

A=3,2,23,9,7

n(A) = 5

Let the rational nos = R

n(R) = 2 (3, 9)

P(R) = 2/5