1.
Get on the boat! A small ferry runs every half hour (a) Find P(Y< 20). Interpret this result.
from one side of a large river to the other. The proba- (b) Express the event "at least $20 is collected" in terms
bility distribution for the random variable Y = money
of Y. What is the probability of this event?
collected (in dollars) on a randomly selected ferry trip
is shown here.
Money collected
Probability
0 5
10 15 20 25
0.02 0.05 0.08 0.16 0.27 0.42
