Question

When Andrei surveyed 36 random seventh-grade students in the lunchroom, he found that 7 out of 9 would like to try or have already tried snorkeling. Using proportional reasoning, about how many of the 810 seventh-grade students in his school would like to snorkel?

Answer 1

Answer is C

Explanation:

Answer 2

630

Explanation:

The ratio of students that would like to try or already have tried snorkeling is 7/9.

The ratio of all students is an unknown amount out of 810 total students; this gives us x/810.

This gives us the proportion:

7/9 = x/810

Cross multiplying,

7*810 = 9*x

5670 = 9x

Divide both sides by 9:

5670/9 = 9x/9

630 = x