There are 23 students in a classroom. 18 are taking math and 15 are taking science. Six students are taking math but not science.

Please disregard my comment. The heading states it... lol

If you draw two intersecting circles for a Venn Diagram

You have 3 areas... The intersecting area in the middle is

for students taking both math and science. The left circle

label math. The right circle label science. The middle area

label both.

Putting a 6 in the area for math only leaves 12 to put

in the area for taking both.

That means there are 3 taking science only to make the

15 that take science.

So we have:

Math only ... 6

Science only... 3

Both ... 12

------

21

Since we have 23 students, 2 students take neither math nor science.

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