The enrollment for a college last year was 2250 students, including 180 engineering majors. The enrollment for the college this year is 2330 students, including 233 engineering majors. In which year was the fraction of engineering majors greater?

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?