Among the licensed drivers in the same age group, what is the probability that a 78-year-old was involved in an accident? Use the table below.
Drivers in
Age group accidents
(thousands)
19 and under 2150
20-24 2620
25-34 3740
35-44 3220
45-54 3030
55-64 1990
65-74 790
75 and over 560
Drivers in
fatal
accidents
15,400
8,700
10,700
9600
19400
6500
3800
4300
Licensed
Drivers
(thousands)
10.034
17,173
35,712
40,322
40,937
30.355
17,246
13,321
A. 4.2%
B. 4.6%

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?