Question: The cookie dough used by a bakery to make 2-once cookies contains an average of 32 raisins per pound of dough. The bakery sells cookies in bags of a dozen.
a) Suppose that customers complain if one or more of the cookies in a bag contains no raising. Over the long run, about what proportion of bags of cookies give rise to complaints?
b) Approximately what average number of raisins per pound would ensure that only 5% of the bags give rise to complaints?