Question

If a number is picked up from 1 to 100, what is the probability that it is not a 1 point multiple of a prime number? ​

Answer 1

Explanation:

The prime numbers from 1 to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. Hence, the probability of the event that a number chosen from 1 to 100 is a prime number . Therefore, the correct option is (C).

Answer 2

Answer:The prime numbers from 1 to 100 are:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.

Therefore, total prime numbers from 1 to 100 = 25

Number of way of choosing prime number = 25C₁ = 25

Number of way of choosing any number = 100C₁ = 100

Hence, the probability of the event that a number chosen from 1 to 100 is a prime number .