Question

A light-rail service claims to be on time 98% of the time. If Jeanette takes the light-rail 40 times how many times can she predict she will be on time?

Answer 1

Approximately 39 times

Explanation:

The light-rail service claims to be on time 98% of the time.

This means the probability that the light-rail service is on time is 0.98.

We want to calculate the number of times Jeanette will be on time if she takes the light trail 40 times.

This is the expected value.

We multiply the probability by the number of times she takes the trail.

`= 0.98 * 40`

`= 39.2`