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A number is selected at random from the set {1, 2, 3, ........, 50}. The probability that it is a prime, is

0.1
0.2
0.3
0.3

Correct Answer: 0.3

Explanation:

n(s) = 50
Prime numbers are = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
∴ n(E) = 15
∴ p(E) = 15/50 = 3/10 = 0.3

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