Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 20. Use the68-95-99.7 rule to find the following quantities.

a. The percentage of scores less than 80 is

50

(Round to one decimal place asneeded.)

b. The percentage of scores greater than 100 is

16

(Round to one decimal place asneeded.)

c. The percentage of scores between 40 and 100 is

(Round to one decimal place asneeded.)