Twenty-four subjects volunteer for a study of a new cold medicine. Nine of the volunteers are ages 20-39, 7 are ages 40-59, and 8 are age 60 or older. If 7 volunteers are selected at random, find the following probabilities. (a) the probability that all the volunteers selected are ages 20-39 (b) the probability that 5 of the volunteers are ages 20-39 and 2 are age 60 or older (c) the probability that 2 of the volunteers are ages 40-59

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