Chapter 16, Problem 11E

A coin is tossed three times in a row The observation is how the coin lands (heads or tails) on each toss [see Exercise 1(a) ]. Write out the event described by each of the

following statements as a set.

a. $E_1$: “the coin comes up heads exactly twice.”

b. $E_2$:“all three tosses come up the same.”

c. $E_3$: “exactly half of the tosses come up heads.”

d. $E_4$: “the first two tosses come up tails.”