one day, 40 members who came to an athletic club were asked to
complete a survey.
question
result
are you male or female?
28 male, 12 female
are you under 26 years old?
24 yes, 16 no
do you use weight machines?
32 yes, 8 no
do you participate in aerobics classes? 14 yes, 26 no
if the athletic club has 870 members, use the survey results to
estimate the number of members who:
7. are male
8. are 26 or older
9. use weight machines
10. take aerobics classes