What is the probability that a number selected from numbers [1,30] is prime number?
(A) 1/3
(B) 2/7
(C) 5/9
(D) 5/30
Answer: (A)
Explanation: The number of prime number from 1 to 30 are 10 (2, 3, 5, 7, 11, 13, 17, 19, 23, 29)
Therefore the required answer is 10/30=1/3
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