50 students are randomly selected and 4 own cars. If there are 800 students, how many of them own cars?

Answer 1

Using proportion, we can set up the following equation:

50 students = 4 own cars
800 students = x own cars

By cross multiplying, we get:

50x = 3200
x = 64

Therefore, out of the 800 students, 64 of them own cars.