1. last week, 39% of the shirts sold at walmart were black. in comparison, 15 out of 30 shirts sold at forever 21 were black. which store sold a greater percentage of black shirts? •walmart •forever 21 •neither, they are both the same < 3

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?