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Suppose that a certain college class contains 63 students. Of these, 30 are seniors, 37 are history majors, and 6 are neither. A student is
Suppose that a certain college class contains 63 students. Of these, 30 are seniors, 37 are history majors, and 6 are neither. A student is selected at random from the class.
(a) What is the probability that the student is both a senior and a history major?(b) Given that the student selected is a history major, what is the probability that he is also a senior?
Write your responses as fractions.
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