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The number of chocolate chips in and 18 ounce bag of chocolate chips is approximately normally...

The number of chocolate chips in and 18 ounce bag of chocolate chips is approximately normally distributed with mean 1252 and standard deviation 129 chips.

a) What is the probability that a random selected bag contains between 1000 and 14000 chocolate chips?

b) what is the probability that a randomly selected bag contains fewer than 1025 chocolate chips?

c) what proportion of bags contains more than 1225 chocolate chips?

d) What is the percentile rank of a bag that contains 1050 chocolate chips?

math   Statistics-And-Probability   
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