Find the probability that a number selected from numbers 1, 2, 3,..., 40 is a prime number, when each of the given numbers is equally likely to be selected?	Choose the correct answer.
A) 10/40 B) 12/40 C) 8/40 D) 3/40 E) 7/40
Let X be the event of selecting a prime number.   X = {2, 3, 5, 7, 11, 13, 17, 19,23,29,31,37}   n(X) = 12,   n(S) = 40   Hence, the required probability is 12/40.   ANSWER:12/40
<result>B</result>
Find the probability that a number selected from numbers 1, 2, 3,..., 40 is a prime number, when each of the given numbers is equally likely to be selected?