The Campus Bookstore Knows from the Past Several Semesters That

Multiple Choice

The campus bookstore knows from the past several semesters that a certain elementary statistics book has a demand that is approximated by a normal distribution with a mean of 250 and a standard deviation of 40.They buy these books for $105 each and sell them to unsuspecting undergraduates at $222 each.All demand for this book is realized by the middle of the semester, at which point the bookstore bundles them up and sells them to a vendor in another country for $40 each.What is the marginal profit for a single elementary statistics book?

A) $40
B) $105
C) $117
D) $222