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Math Help - confusion?

  1. #1
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    confusion?

    1. There are 90 cows which are either white or brown or a combination of white and brown. If 55 of them are white or partially white and 75 are brown or partially brown, then how many of them are completely white?
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  2. #2
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    Quote Originally Posted by bluffmaster.roy.007 View Post
    1. There are 90 cows which are either white or brown or a combination of white and brown. If 55 of them are white or partially white and 75 are brown or partially brown, then how many of them are completely white?
    draw a Venn-diagram.
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