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A bag contains seven balls numbered 1; 2, 2; 3, 3; 3, and 4. Let X be the random variable representing the square bf selected

A bag contains seven balls numbered 1; 2, 2; 3, 3; 3, and 4. Let X be the random variable representing the square bf selected numbered ball and then subtracting 4. Compute the mean and variance bf the random variable X

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