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Math Help - PLEASE help! venn diagrams, kind of confusing! I really appreciate it!

  1. #1
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    PLEASE help! venn diagrams, kind of confusing! I really appreciate it!

    I've been trying to figure this one out for hours, anyone that can help me...I'd be eternally grateful.

    Most mathematics professors love to invest their hard earned money. A recent survey of 150 math professors revealed that
    111 invested in stocks;
    98 invested in bonds;
    100 invested in certificates of deposit;
    80 invested in stocks and bonds;
    83 invested in bonds and certificates of deposit;
    85 invested in stocks and certificates of deposit;
    9 did not invest in any of the three.
    How many mathematics professors invested in stocks and bonds and certificates of deposit?

    Thank you so much!!
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  2. #2
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    Please correct me if I am wrong, it appears to me that you are asking for someone to simply do this problem for you.
    If that is correct, then you have completely misunderstood how this forum works.
    YOU have to show some work on your part.
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  3. #3
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    Okay, sorry if I misunderstood. Here's what I have so far:


    EDIT: I MEANT 100 TOTAL CD's on the image, I didn't make that mistake in my work.

    Then I tried adding them up to the 150...but I still couldn't find x because it wouldn't work. Am I on the right path?
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  4. #4
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    anyone with any suggestions on what to do next?

    Thanks!
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