One day, a person went to a horse racing area. instead of counting the number of humans an horses, he conuted 74 heads and 196 legs. how many humans and horses were there?
a.
37 humans and 98 horses
b.
24 horses and 50 humans
c.
31 horses and 74 humans
d.
24 humans and 50 horses

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?