In a high school graduating class of 100 students, 55 studied mathematics, 63 studied computer science, and 31 studied both mathematics and computer science. If one of these students is selected at random, find the probability that (a) the student took mathematics or computer science; (b) the student did not take either of these subjects; (c) the student took mathematics but not computer science.

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Q: In a certain college, 33% of the physics majors belong to ethnic minorities. If 10 students are…

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