Posted by **Daniel** on Monday, March 7, 2011 at 3:23pm.

A group of 32 students went to the amusement park.All of them either rode the Ferris wheel or Roller coaster.Seventeen rode the Ferris wheel,23 rode the roller coaster,and 8 did both.How many rode only the Ferris wheel

- 7th grade math -
**Daniel**, Monday, March 7, 2011 at 3:26pm
You need to show a Venn Diagram for this question

- 7th grade math -
**Reiny**, Monday, March 7, 2011 at 3:47pm
Have you done Venn diagrams before?

Draw two intersecting circles, call then F and R

put 8 in the intersection of F and R.

put 17-8 or 9 in the region of F not intersected.

put 23-8 or 15 in the region of R not intersected.

So counting up what we have:

9 + 8 + 15 = 32 , good!

How many are "only" in the F circle ?

- 7th grade math -
**Anonymous**, Monday, March 14, 2011 at 7:42pm
The answer to the question is 25 people rode the ferris wheel

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