The probability that a number selected at random from the first 100 natural numbers is a composite number is ?
Choices:
A) 2/3  B) 3/5  C) 3/4  D) 3/2  E) 5/2
Explanation:   The number of exhaustive events = 100 C₁ = 100.   We have 25 primes from 1 to 100.   Number of favourable cases are 75.   Required probability = 75/50 = 3/2.   Answer is 3/2
<result>D</result>
The probability that a number selected at random from the first 100 natural numbers is a composite number is ?