math
posted by Anonymous on .
In a recent survey of 100 women, the following information was gathered.
31 use shampoo A.
27 use shampoo B.
36 use shampoo C.
8 use shampoos A and B.
3 use shampoos A and C.
5 use shampoos B and C.
1 use all three.
Use the figure to answer the question in the problem.
How many are using shampoos A and C, but not B (Region IV)?
1 . women

I don't know how to get this answer help me please

Make a Venn diagram. Label the small center section with 1, since only 1 person uses all 3.
Now label the intersection of A&B with 8, and the intersection of A&C with 3.
Now the portion of A outside B and C is 31831 = 19.
Moving right along, you will see that the answer is 3