A company fabricates specialpurpose robots and records show

A company fabricates special-purpose robots, and records show that the probability is 0.10 that one of its new robots will require repairs during confirmation tests, Assume that the trials are independent. What the probability that if it builds 20 robots exactly 3 will require repairs What is the probability that the eighth robot it builds is the first one to require repairs What is the probability that the twelfth robot it builds is the second one to require repairs

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