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n a class of 45 students, 25 students failed maths, 20 students failed physics, and 10 students failed both subjects. a student is selected at random. (a) if he failed physics, find the probability that he failed in maths. (b) if he failed maths, find the probability that he failed in physics. (c) find the probability that he failed in maths or physics, but not both. chegg

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