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Marijuana Use The percent distribution of the last marijuana use (either medical or
nonmedical) for a sample of 13,373 college students is shown in the pie chart. Find the
probability of each event. (Source: American College Health Association)

a. Randomly selecting a student who never used marijuana
b. Randomly selecting a student who used marijuana
c. Randomly selecting a student who used marijuana within the last 30 days
d. Randomly selecting a student who has not used marijuana within the last 12
months