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?
The best prediction possible for the number of times you will pick a purple marble is 4 times. This is because there are 4 purple marbles out of the total 10 marbles, so the probability of picking a purple marble is 4/10 or 0.4. Therefore, if you pick marbles randomly 10 times, the best prediction would be that you will pick a purple marble 4 times.
