In a class of 30 pupils, 18 take Social Studies and 17 take Technical Drawing, 3 take neither. How m

Discussion in 'Calculator Requests' started by math_celebrity, Dec 25, 2020.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    In a class of 30 pupils, 18 take Social Studies and 17 take Technical Drawing, 3 take neither. How many take both Social Studies and Technical Drawing?

    Let students who take both be b. We have:
    18 + 17 + 3 - b = 30
    38 - b = 30

    Using our equation solver, we get:
    b = 8
     

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