February 23, 2017

Homework Help: Math

Posted by Mike on Wednesday, December 5, 2012 at 11:01pm.

In a recent survey of 100 women, the following information was gathered.
52 use shampoo A.
31 use shampoo B.
39 use shampoo C.
11 use shampoos A and B.
13 use shampoos A and C.
15 use shampoos B and C.
10 use all three.

How many are using shampoo A only? ___
Using the Venn diagram, I got 35 but it was wrong.

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