Let x be the number of correct answers when the student has
A student is given 4 questions, each with a choice of 3 answers. Let X be the number of correct answers when the student has to guess each answer. Compute the probability function and the mean and variance of X.
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a student is given 4 questions each with a choice of 3 answers let x be the number of correct answers when the student
to review chapter 2 consider the experiment of tossing 3 coins the number of heads x may be 0 1 2 or 3 repeat this
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