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    Question

    A factory produces three types of products, X, Y, and Z.

    The average production of product X over 5 days is 120 units per day. The average production of product Y over the same period is 150 units per day. If the total average production of all three products over these 5 days is 450 units per day, what is the average production of product Z over these 5 days?
    A 125 Correct Answer Incorrect Answer
    B 180 Correct Answer Incorrect Answer
    C 175 Correct Answer Incorrect Answer
    D 185 Correct Answer Incorrect Answer
    E 145 Correct Answer Incorrect Answer

    Solution

    Total production of product X over 5 days = 5× 120 = 600 Total production of product Y over 5 days = 5×150 = 750 Total production of product (X+Y+Z) over 5 days = 5×450 = 2250 Total production of product Z over 5 days = 2250 – (600+750) = 900 Required average = 900/5 = 180

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