A regular number cube is rolled. What is the probability that a 3 will not be rolled?

Solution:

Given, a cube is rolled.

We have to find the probability that a 3 will not be rolled.

The possible outcomes when a cube is rolled = {1, 2, 3, 4, 5, 6}

When a cube is rolled, each number has a 1/6 chance of being rolled.

When a 3 is not rolled, any of the other 5 numbers can be rolled.

So, P(not getting 3) = 1 - 1/6

= (6-1)/6

= 5/6

Therefore, the probability of not getting a 3 is 5/6.

A regular number cube is rolled. What is the probability that a 3 will not be rolled?

Summary:

A regular number cube is rolled. The probability that a 3 will not be rolled is 5/6.