Question

What is the probability of selecting a number at random from the numbers 1 to 24 that is not divisible by 3?

Answer 1

`2/3`

Explanation:

Since `24` is divisible by `3` the number of numbers between 1 and 24 that are divisible by `3` is:

`24/3 = 8`

Hence the probabliity of selecting a number at ramdom that IS divisible by `3` is:

`8/24 = 1/3`

`:.` the probability of selecting a number that IS NOT divisible `3` is:

`1-1/3 =2/3`