Seven of ten students polled say that they prefer to practice for a team sport after school than before school. Based on this sample, how many students would you expect out of a population of 120 to prefer to practice after school?

70

36

84

77

Question

Seven of ten students polled say that they prefer to practice for a team sport after school than before school. Based on this sample, how many students would you expect out of a population of 120 to prefer to practice after school?



70

36

84

77

mackenzie2013 · Answer

Wouldnt you put it in a proportion which would be, 7/10= x/120?

anonymous · Answer

Yes that's exactly right.

mackenzie2013 · Answer

Then you would cross multiply so youd have 840=10x?

anonymous · Answer

Yeah. Then you would just simplify that down to get your final answer.

mackenzie2013 · Answer

Can you show me, im having a blonde moment :3

anonymous · Answer

So you got yourself to 840=10x. You want to get x by its self so you need to divide both sides of the equation by 10. 10/10 is 1 so that makes that side =1x and 840/10 is 84 so that means that side is equal to 84. That makes the answer x=84. So 84 students out of 120 prefer to practice after school.

mackenzie2013 · Answer

Thank you!

anonymous · Answer

No problem! :)