# 8.8.1. Probability

The following table shows the results of a survey of the most favorable transportation means to go to school:

Transportation Means Sum Number of Students 100 Bus Private Car Bicycle On Foot 4 17 27 52

If a student is randomly selected, find the probability of selecting a student who prefers walking.

• A0.52
• B0.4
• C0.17
• D0.27

### Example

The following table shows the results of a survey of the most favorable transportation means to go to school:

Transportation Means Sum Number of Students 100 Bus Private Car Bicycle On Foot 4 17 27 52

If a student is randomly selected, find the probability of selecting a student who prefers walking.

### Solution

The probability of an event is the ratio between the number of outcomes of the event and the number of all possible outcomes in the sample space.

To find the probability that a randomly selected student prefers walking, divide the number of students in the survey who prefer walking (on foot) by the total number of students in the survey.

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