Question

You select a marble without looking and then put it back. If you do this 11 times, what is the best prediction possible for the number of times you will pick a marble that is not pink?

(There are 11 marbles total)

Answer 1

The best prediction possible for the number of times you will pick a marble that is not pink is 0 times. Since there are 11 marbles total and the question specifies that you select a marble without looking and then put it back for a total of 11 times, there is a possibility that you could pick all pink marbles each time. Therefore, the best prediction is that you will not pick a non-pink marble at all.