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    Venn diagram problem

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    How many in only single?

    3 Magazines (D, R, I); total number of people is 1000

    250 - D, I, not R
    40 - I, R, not D
    120 - R, not in I
    200 - I, not in D
    90 - D, R
    70 - none

    This is a review but I don't understand

    Professor told us to get answer = (y+Z+160)+250+90-x+X=40+70=1000

    But I don't understand how to get y, z and x?

    © BrainMass Inc. brainmass.com October 9, 2019, 11:09 pm ad1c9bdddf
    https://brainmass.com/math/discrete-math/venn-diagram-problem-246283

    Solution Preview

    Hi,

    Please find the solutions/explanations attached.

    How many in only single?

    3 Magazines (D, R, I); total number of people ...

    Solution Summary

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