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Thread: sat math problem average

  1. #1
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    sat math problem average

    25% of the officers in a camp are senior officers and the remaining are junior officers. The monthly wage of each senior officer is $4,500 and the monthly wage of each junior officer is $3,500. What is the average monthly wage of all officers in the camp?


    (A)

    (B)

    (C)

    (D)

    Thanks!

  2. #2
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    Let be the total number of officers in this camp. The number of senior officers would be and the number of junior officers would be .

    The total monthly wages of all senior officers would be

    Similar, the total monthly wages of all junior officers would be

    Hence, the total monthly wages of all officers would be

    Therefore, the average monthly wage of all officers would be



    Therefore the correct answer is (C).

  3. #3
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    thank you!

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