1.Super Cola sales break down as 80% regular soda and 20% diet soda.
While 60% of the regular soda is purchased by men, only 30% of the
diet soda is purchased by men. If a woman purchases Super Cola, what
is the probability that it is a diet soda?

1. decide whether the question is asking for a joint probability or a
conditional probability

2. develop a joint probability table, and compute the marginal
probabilities (i.e.,
percentages of all sodas purchased by men; by women; percentage of
diet sodas out of
total;  percentage of regular sodas out of total)