In my class

There are 42 students in our class. We are having four ways to go to school. By bike, bus, taxi and on foot. There are 11 students getting to school on foot, because it’s healthy for us. 16 students go to school by bike, but it’s the most dangerous way. There are 12 students getting to school by rus. 3 students go to school by taxi, because it’s the most expensive way. How do you get to school?