Question

The numbers chosen at random from 1 to 25 find the probability of not selecting a prime number

Answer 1

Explanation:

First of all we need to know the number of primes

2 3 5 7 11 13 17 19 23

There are 9 primes between 1 and 25

Therefore there are 16 numbers that are not prime. (1 is not considered prime).

P(not prime) = 16/25 = 0.64