The probability that a number selected at random from first 50 natural numbers is a composite number is  Choose one:
A) 21/25 B) 17/25 C) 4/25 D) 8/25 E) 10/25
The number of exhaustive events = 50C1 = 50. We have 15 primes from 1 to 50.   Number of favourable cases are 34.   Therefore, Required probability = 34/50 = 17/25.   ANSWER:17/25
<result>B</result>
The probability that a number selected at random from first 50 natural numbers is a composite number is