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The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 9.3 mg and a standard deviation of 1.57

The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 9.3 mg and a standard deviation of 1.57 mg. Find the probability of randomly selecting a cigarette with 6 mg of nicotineor less.

P(X< 6 mg) =

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