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cant understand 17 The lifetime of Zaple smartphone batteries, X hours, is normally distributed with mean 8 hours and standard deviation 1.5 hours. 17 (a)

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17 The lifetime of Zaple smartphone batteries, X hours, is normally distributed with mean 8 hours and standard deviation 1.5 hours. 17 (a) (i) Find P(X # 8) [1 mark] 17 (a) (ii) Find P(6

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