Question

You select a marble without looking and then put it back. If you do this 36 times, what is the best prediction possible for the number of times you will pick a blue marble?

Answer 1

12 times

Explanation:

There are 3 blue marbles and 9 marbles total. The probability of selecting a blue marble is 3/9, reduced it is 1/3.

Multiply the probability by 36

`(1)/(3)` ×
`(36)/(1)`

`(36)/(3)`

12