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Math Help - students study all four languages

  1. #1
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    students study all four languages

    I need help in the below problem.
    Thanks

    A school has 100 pupils in which 69% of the pupil study French. 79% study Chinese, 89% study Japanese and 99% study English. Given that we know x% of the students study all four languages. Find the value of x.
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  2. #2
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    Re: students study all four languages

    There is not enough information. We would also need to know how many study any combination of 2 or 3 languages.
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