The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed
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Question:
The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and a standard deviation of 129 chips.
(a) What is the probability that a randomly selected bag contains between 1000 and 1400 chocolate chips, inclusive
(b) What is the probability that a randomly selected bag contains fewer than 1125 chocolate chips
(c) What proportion of bags contains more than 1225 chocolate chips
(d) What is the percentile rank of a bag that contains 1425 chocolate chips
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