Anamika carries a bag which contains 50 coins and each coin is marked from 51 to 100. If she picked one coin at random find the probability that the number on the coin is not a prime number.
Correct Answer: Option D
There are 10 prime numbers between 51 to 100: 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
∴ Probability that the number on the coin is a prime number = (10/50) = (1/5)
Probability that the number on the coin is not a prime number = 1 - probability that the number on the coin is a prime number
⇒ Probability that the number on the coin is not a prime number = 1 – 1/5 = 4/5
Download our app for free and access thousands of MCQ questions with detailed solutions