Among the eighth-graders in michael'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

d. 192

Step-by-step explanation:

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.

hope this helps can i be brainliest please

b

step-by-step explanation:

the word superfluous means unnecessary