Find the probability of getting a non prime number if a die is thrown once

The correct answer is 1/3.

Explanation:

If a number is non-prime, that means that it is divisible by more than 1 and itself. The only numbers that this is true for on a die are 4 and 6.

There are two possible outcomes out of a total of 6 outcomes on a die, so the probability is 2/6=1/3.