Student Travel Preferences: Walking

A group of students were surveyed about how they travel to school. The results are displayed in the bar graph below:

The bar graph shows the following travel methods: Walking, Biking, Car, and Bus. The data indicates that:

- 10 students walk to school

- 5 students bike to school

- 8 students come by car

- 7 students take the bus

Questions: How many students prefer to walk to school?