# 8.8.1. Probability

The table shows the results of a survey conducted on students’ means of commute to school. If a student is randomly selected, find the percentage representing the probability of selecting a student who commutes walking.

 Transportation Means Number of Students Bus Taxi Bicycle Walking 6 11 20 63
• A
• B
• C
• D

### Example

The following table shows the results of a survey of the students’ favorite transportation means to go to school:

 Transportation Means Number of Students Bus Private Car Bicycle On Foot 5 8 24 63

If a student is randomly selected, find the probability of selecting a private car user.

### 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 to use a private car, divide the number of students in the survey who chose "private car" by the total number of students in the survey.

To express the probability as a percentage, multiply it by 100: .

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