he number of chocolate chips in an? 18-ounce bag of chocolatechip cookies is approximately normally distributed with a mean of1252 chips and standard deviation 129 chips.
?(a) What is the probability that a randomly selected bagcontains between 1100 and 1400 chocolate? chips, inclusive?
?(b) What is the probability that a randomly selected bagcontains fewer than 1025 chocolate? chips?
?(c) What proportion of bags contains more than 1200 chocolate?chips?
?(d) What is the percentile rank of a bag that contains 1050chocolate? chips?
