(1) There are 20 questions in a multiple choice test. Each question has five choices and one correct answer of these five choices. A student did not study. He/she answers the questions at random. What are the probability that he/she makes...more than 10 answers right?exactly eight right?at most 7 right?
(2)A can company reports that the number of machine breakdown in an eight hour shift has a mean of 1.5. Find the probability that there will...exactly 2 breakdowns? Fewer than 2 breakdowns? no breakdowns in 3 consecutive shift?
The solution calculates the number of machine breakdowns and the probability of getting a certain number of multiple choice questions right.