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Discussion

  1. The average salary of the entire staff in an office is ₹ 200 per day. The average salary of officers is ₹ 550 and that of non officers is ₹ 120. If the number of officers is 16, then find the number of non officers in the office.
    1. 72
    2. 60
    3. 70
    4. 65
  1. Correct Option: C

    Let the number of non-officers be y.

    Then number of entire staff = 16 + y

    Sum of total salary = 200(16 + y)
    =16 x 550 + 120y
    ⇒ 120y + 550 x 16 = 200x16 + 200y
    ⇒ 3y +220 = 80 + 5y
    ⇒ 2y = 140
    ∴ y = 140/2 = 70

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