Question

Suppose that 10% of adults belong to health clubs, and 40% of these health club members go to the club at least twice a week. What percent of all adults go to a health club at least twice a week? Write the information given in terms of probabilities and use the general multiplication rule.

Answer 1

Answer:

4% of all adults go to a health club at least twice a week

Step-by-step explanation:

• the proportion of adults who belong to health clubs is 10% that is 0.10

• the proportion of these adults (health club members) go to the club at least twice a week is 40%, that is 0.40.

Thus, the proportion of all adults go to a health club at least twice a week is

0.10 × 0.40 = 0.04, that is 4%