Question

If a standard number cube is rolled 66 times, what is the expected

number of times a 1 or 2 will be rolled?

PLEASE HELP WILL GIVE 10 POINTS !!!!!

Answer 1

22

Explanation:

A standard number cube is a cube with each side labeled with one of the numbers 1 through 6. Therefore, the probability of rolling a 1 or a 2 on one roll is

`(2)/(6)` =
`(1)/(3)`

If we assume that each roll is independent, then the expected number of times a 1 or 2 will be rolled in 66 rolls is

`(1)/(3)` ​× 66 = 22

So, the answer is 22.