Among the eighth-graders in Micheal's school, 70% have siblings. The eighth-grade class is 5/6 the size of the seventh-grade class.

If 112 eighth-graders have siblings, how many students are in the seventh grade

A) 128

B) 134

C) 160

D) 192

The correct answer is D) 192 brainliest.

OK so if 70% of students in 8th grade have siblings and 112 8th graders have siblings, then:

0.7 (total 8th graders) = 112

total 8th graders = 112/0.7

total 8th graders = 160

And since the number of 8th graders is 5/6 the size of the 7th grade class:

5/6 (7th grade class) = 160

5 (7th grade class) = 960

7th grade class = 192.

The correct answer is D) 192.