1. From a single deck of cards, you select a card, look at it, put it back in the deck and shuffle. If you do this 10 times, what is the probability of drawing exactly (1) ace, (b) two aces, (c) 3 aces, or (4) four aces (each of these is calculated separately)? Out of the 10 draws of cards, what is the mean number of aces that you would expect to find?

Please explain clearly!