Question

A group of people were asked if they had run a red light in the last year. 417 responded "yes", and 277 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year.

Answer 1

The probability of an event denoted P(E) is:

$P(E)=\frac{\text{the number of favorable outcomes}}{\text{total outcomes}}$

So, in this case, we have:

• Favorable outcomes: 417.

,

• Total outcomes: 694.

$277+417=694$

Therefore, the probability that if a person is chosen at random, they have run a red light in the last year is:

$P(E)=\frac{417}{694}$