Suppose that a school band contains 10 students from the
Question and Solution
Suppose that a school band contains 10 students from the freshman class, 20 students from the sophomore class, 30 studen
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Suppose that a school band contains 10 students from the freshman class, 20 students from the sophomore class, 30 students from the junior class, and 40 students from the senior class. If 15 students are selected at random from the band, what is the probability that at least one student will be selected from each of the four classes? Hint: First determine the probability that at least one of the four classes will not be represented in the selection.
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