Math

In a class of 40students,23 offer biology and 27 offer chemistry.Each student offers at least one of the two subjects.How many students offer both subjects?

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  1. I think you're using the word "offer" incorrectly. The question should read as follows:
    In a class of 40students, 23 take biology and 27 take chemistry. Each student takes at least one of the two subjects. How many students take both subjects?

    Now please wait for a math tutor to help you with the problem itself.

  2. If you just add up 23 and 27, then you have counted twice those who take both. So, if there are x of those, then
    23+27-x = 40

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