Students from the freshman class

Reference no: EM131829772

Suppose that a school band contains 10 students from the freshman class, 20 students from the\ sophomore class, 30 students from the junior class, an ... d 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?

Reference no: EM131829772

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