Question

It is estimated that only 68% of drivers wear their safety belt. How many people should a police officer expect pull over until she finds a driver not wearing a safety belt

A.1
B 2
C 4
D 3
E 5

Answer 1

c. 4

Explanation:

i took the test

Answer 2

D. 4

Explanation:

Percent of drivers who wear seat belts = 68

Percent of drivers who do not wear seat belts = 100 - 68 = 32

Now, we know that for every 100 pull overs, 32 drivers will not be wearing belt.

32 drivers without seat-belt = 100 pullovers

1 driver without seat-belt = 100/32 pullovers

1 driver without seat-belt = 3.125 pullovers (4 pullovers)

So, a police officer should expect 4 pullovers until she finds a driver not wearing a seat-belt.