Question: Q.4 Tom throws a fair die repeatedly. If Tom throws the die n times, and let N,, denote the number of distinct faces of the

Q.4 Tom throws a fair die repeatedly. If Tom throws the die n times, and let N,, denote the number of distinct faces of the die that he has seen, then find the mean and variance of N,. If X denotes the number of times Tom has to throw the die in order to see each face of the die at least once, then find the mean and variance of X

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