Answer:
5 people
Explanation:
Given
Let P =Percentage of people using signal
P = 78%
Let Q = Percentage of people not using signal
P + Q = 1 ---- Make Q the subject of formula
Q = 1 - 78%
Q = 1 - 0.78
Q = 0.22
The expected number of people is calculated as 1/Q
= 1/0.22
= 4.54
= 5 ---- Approximated
Hence, the expected number of people a police officer expects to pull over until she finds a driver not using the turn signal is 5
