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Here is a sample problem. Please include solution with your response so I know you know what you're doing
There are 28 questions in a multiple-choice test. Each question has five choices and one correct answer out of these five choices. A student did not study. He/she answers the questions at random. What are the probabilities that he/she makes (i) more than 10-answer right? (ii) exactly eight right? (iii) at most 7 right?