algebra

In a survey of a TriDelt chapter with 50 members, 20 were taking mathematics, 32 were taking English, and 6 were taking both. How many were not taking either of these subjects?

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  1. just recall the rule that

    total = one + other - both.

    So, counting just the ones taking something, you have

    20+32-6 = 46

    So, the other 4 took nothing.

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