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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

  • math -

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

  • math -

    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 31-8-3-1 = 19.

    Moving right along, you will see that the answer is 3

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