Question

The 7th and 8th grades have enrollments of 520 and 650 respectively. The two grades have a total of 18 representatives on the Student Council. How many representatives should the 8th grade have if there is to be a fair representation of the two grades?

Answer 1

10

Explanation:

Answer 2

18 * (8th grade populaton)/ (Total population)
18 * (650 / (650 + 520) )
18 * (650 / 1170)
11700 / 1170 = 10