Braun Research recently surveyed U.S. adults about the number of cups of coffee they drink per day and per week. The percentages are as follows:
Number of Cups Percentage
Two or more cups a day ... 33
One cup a day ....... 19
Two cups a week ..... 11
One cup a week ....... 9
Don’t drink coffee ..... 28
a. What percentage of adults drink coffee?
b. What percentage of adults drink two cups or more of coffee a week?
c. What percentage of adults drink one or two cups per week?