Finding Mean, Variance, and Standard Deviation In Exercises 27 and 28, find the mean, variance, and standard deviation of the discrete random variable x. See Examples 4, 5, and 6.
Spinner A spinner is divided into three equal sections labeled 1, 2. and 3. x is (a) the number landed on when the spinner is spun once and (b) the sum of the numbers landed on when the spinner is spun twice.
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