Find the probability that heads was flipped exactly

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1. A fair coin is flipped 6 times. Find the probability that heads was flipped exactly 4 times.

2. A Finite final consists of 50 multiple choice questions. If each question has 4 choices and 1 right answer, find the probability that a student gets an A (i.e. 45 or better) by purely guessing on each question.

Reference no: EM132384854

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