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28/06/2017 at 23:02
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A study of 50 high shool student showed that exactly 25 of them took Biology, exactly 20 of them took Chemistry, and exactly 12 of them took both subject. How many of the 50 student took neither Biology nor Chemistry?



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    Lê Quốc Trần Anh Coordinator 29/06/2017 at 09:36

    There are: \(25-12=13\left(students\right)\) study only Biology.

    There are: \(20-12=8\left(students\right)\) study only Chemistry.

    There are: \(50-\left(13+8+12\right)=17\left(students\right)\) took neither Biology nor Chemistry.

    ANSWER: 17 students

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    Võ Kim Tuấn Anh 04/07/2017 at 07:43

    There are: 25−12=13(students)25−12=13(students)

    There are: 20−12=8(students)20−12=8(students)

    There are: 50−(13+8+12)=17(students)50−(13+8+12)=17(students)

    ANSWER: 17 students



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