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SSC Quantitative Aptitude Average Question Bank Average (II)

  • question_answer
    The average salary of all the staff in an office of a corporate house is Rs. 5000. The average salary of the officers is Rs. 14000 and that of the rest is Rs. 4000. If the total number of staff is 500, the number of officers is

    A) 10

    B) 15

    C) 25

    D) 50

    Correct Answer: D

    Solution :

    [d] Let number of officers = x Then, number of rest \[=(500-x)\] According to the question, \[500\times 5000=x\times 14000+(500-x)\times 4000\] \[\Rightarrow \]   \[2500=14x+4(500-x)\] \[\Rightarrow \]   \[2500=14x+2000-4x\] \[\Rightarrow \]   500 = 10x \[\Rightarrow \]   \[x=\frac{500}{10}=50\] Thus, number of officers is 50.


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