Question

You roll a number cube. Determine the theoretical probability of not rolling a multiple of 3.​

Answer 1

2/3

Explanation:

A number cube has 6 sides with 1,2,3,4,5,6

Multiple of 3 are 3,6.

So 2/6 is the probability of rolling a multiple.

6/6 (total probability of rolling everything) minus 2/6 (probability of rolling a multiple of 3)

equals 4/6.

4/6 simplified is 2/3 or 0.666666... or 66.6... %