Cindy, Hao and Raymond have some books. Cindy has three times as many books as Hao and Raymond has half as many books as Hao. Between the three of them, the mean number of books that each person owns is 15. How many books does each person own?

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?