The weights of ice cream cartons are normally distributed with a mean weight of 7 ounces and a standard deviation of 0,6 ounce. (a) What is the probability that a randomly selected carton has a weight greater than 7,24 ounces? (b) A sample of 16 cartons is randomly selected. What is the probability that their mean weight is greater than 7.24 ounces?

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