Question

In Mr. Ferreia's class, 80% of the students live more than half a mile from school. Of those students, 80% come to school by public transportation. Of the students using public transportation, 75% take the bus, and 75% of those students buy monthly bus passes. Nine students buy monthly passes. How many students are in Mr. Ferreira's class?

Answer 1

25 students

Explanation:

Answer 2

25 students

Explanation:

80% of 80% com by public transportation, it's 64% (0.8 x 0.8)

75% of 64% take the bus, it's 48% (0.64 x 0.75)

75% of 48% buy monthly passes, it's 36% (0.75 x 0.48)

0.36x = 9 (nine students buy monthly passes)

x = 25 (students)