shawnbahamas2051 shawnbahamas2051

08-03-2024
Mathematics

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Suppose the length of life of large shipments of flashlight batteries is normally distributed with a mean equal to 150 hours and a standard deviation of 20 hours. What is the probability that 2 of a random sample will last less than 160 hours?
a) 0.3085
b) 0.6915
c) 0.8413
d) 0.1587

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