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April 20, 2015

April 20, 2015

Posted by **Jerry** on Sunday, September 25, 2011 at 4:03pm.

- Math -
**Reiny**, Sunday, September 25, 2011 at 4:46pmMake a Venn diagram with two intersecting circles

label "only biology" as x

place 18 in the intersection

place 43 in the "only psychology"

place 12 outside the two circles

x + 18 + 43 + 12 = 100

x = 27

So Biology was taken by 27+18 or 45 students

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