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average US adult spends 38 minutes per day on Facebook. If the time they spend on Facebook follows a normal distribution and the standard deviation

average US adult spends 38 minutes per day on Facebook. If the time they spend on Facebook follows a normal distribution and the standard deviation is 6.6 minutes, what is the probability that a particular user will spend - More than 60 minutes per day on Facebook. [1 Mark] Less than 10 minutes per day on Facebook. [1 Mark] Between 20 and 30 minutes per day on Facebook

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