The probability that a number selected at random from first 50 natural numbers is a composite number is  Answers
A) 21 / 25  B) 17 / 25  C) 4 / 25  D) 8 / 25  E) 10 / 25

Rationale: "the number of exhaustive events = 50 c 1 = 50 . we have 15 primes from 1 to 50 . number of favourable cases are 34 . therefore , required probability = 34 / 50 = 17 / 25 . answer : b"
Answer: B