Probability
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Consider the following contingency table:
Under 20 21-30 31-40
Male 12 12 17
Female 13 16 21
a. If one person is selected at random, what is the probability that person is Female? ______
b. If one person is selected at random, what is the probability that person is either under 20 or over 30? _______
c. If one person is selected at random, what is the probability that person is either male or in the age group 21-30? _____
d. If two people are selected at random, what is the probability they are both female? ______
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The solution does a great job of answering the problems below. Both the problem and the answers are straightforward and well explained.
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a. (13+16+21)/(13+16+21+12+12+17) = 50/91 = 0.549
b. ...
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