*27. Suppose in Exercise 26 we had defined the events Ei9 i = 1, 2 , 3, 4 , by Ex = (one of the piles contains the ace of spades), E2 = (the ace of spaces and the ace of hearts are in different piles), E3 = (the ace of spades, the ace of hearts, and the ace of diamonds are in different piles), E4 = {all 4 aces are in different piles)

Now use Exercise 23 to find P(EXE2E3E4), the probability that each pile has an ace. Compare your answer with the one you obtained in Exercise 26.