A coin is tossed three times. An outcome is represented by a string of the sort HTT (meaning a head on the first toss, followed by two tails). The 8 outcomes are
listed in the table below. Note that each outcome has the same probability.
For each of the three events in the table, check the outcome(s) that are contained in the event. Then, in the last column, enter the probability of the event.
Event A: A tail on both the first and the
last tosses
Event B: Alternating tail and head (with
either coming first)
Event C: A head on each of the last two
tosses
HHT
0
0
0
HHH THT
0
0
0
0
0
0
Outcomes
TTT THH
0
0
0
0
0
0
HTH
0
0
0
HTT TTH
0
0
0
0
0
0
Probability
0
0
0
X
Espa
E
B
E
