algebra

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In a survey of a TriDelt chapter with 50 members, 21 were taking mathematics, 33 were taking English, and 6 were taking both. How many were not taking either of these subjects?
members

  • algebra -

    N(M or E) = N(M) + N(E) - N(M and E)
    = 21 + 33 - 6 = 48

    but 50 were surveyed
    so 2 did not take either Math or English

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