In a certain town, 25% of people commute to work by bicycle. If a person is selected randomly from the town, what are the odds against selecting someone who commutes by bicycle?
A) 1 : 3
B) 1 : 4
C) 3 : 4
D) 3 : 1

Question

Quizplus · Accepted Answer

The probability of selecting someone who commutes by bicycle is 25%, or 1/4. The odds against this are the ratio of those who do not commute by bicycle (3/4) to those who do (1/4), which simplifies to 3:1.

In a Certain Town, 25% of People Commute to Work