You select a marble without looking and then put it back. If you do this 10 times, what is the best prediction possible for the number of times you will pick a purple marble? 9 blue marbles 4 purple marble
The best prediction possible for the number of times you will pick a purple marble out of 10 selections can be calculated by finding the ratio of purple marbles to the total number of marbles and multiplying it by the number of selections.
In this case, there are 4 purple marbles and 9 blue marbles, for a total of 13 marbles.
So, the probability of picking a purple marble in one selection is 4/13.
Therefore, the best prediction for the number of times you will pick a purple marble out of 10 selections is:
(4/13) x 10 = 3.08
Therefore, you can predict that you will pick a purple marble around 3 times out of the 10 selections.