Question

A number is selected from the numbers 1 to 20. what is the probability that it will be a prime

Answer 1

Let us check the number of prime numbers between 1 to 20,

The prime numbers between 1 to 20 are:-

2,3,5,7,,11,13,17,19

Totally, there are 8 prime numbers between 1 to 20.

Hence, Favorable cases = 8

Therefore, 8/20=2/5.

There is a 2/5th chance of getting a prime number