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the amount of money that students spend on their cell phones per week in normally distributed...

the amount of money that students spend on their cell phones per week in normally distributed with a mean of 52.00 and standard deviation of 6.00. 1.2.1 What is the probability that a student studies for more that 60.00 per week? 1.2.2 find the probability that the mean amount of money on cell phones for three randomly selected students is less than 60.66 per week.

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