Question: When X is a binomial random variable, the mean of the probability distribution = np. If a test has 166 multiple-choice questions and each question

When X is a binomial random variable, the mean of the probability distribution = np. If a test has 166 multiple-choice questions and each question has 4 answers, and a student is guessing so the probability of each answer is the same on each question. If X is a binomial random variable which counts how many questions a student got correct, find the mean number of questions that would be expected to be correct if the student guessed

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