The probability that a number selected at random from the first 50 natural numbers is a composite number is -

Answer: Option B

The number of exhaustive events = $${}^{50}{C}_1$$ = 50
We have 15 primes from 1 to 50
Number of favourable cases are 34
Required probability = $$\frac{34}{50}$$ = $$\frac{17}{25}$$