Sam is practising free-throws in basketball. She has a 4/5 chance of scoring each time she shoots from the free-throw line. (You should assume that the probability of scoring for each shot is independent of the result of other attempts.) What is the expected value of the number of free-throws that Sam will score before her fırst miss? 4/25 What is the variance of the number of free-throws that Sam will score before her first miss? 1/4

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