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      Question

      2 assistants are as efficient as one senior officer. If 40

      assistants prepare 100 reports in 5 days, how many senior officers are needed to prepare 100 reports in 2 days?
      A 28 Correct Answer Incorrect Answer
      B 68 Correct Answer Incorrect Answer
      C 90 Correct Answer Incorrect Answer
      D 50 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the efficiency of each assistant be 'x' units/day

      Efficiency of each officer = 2x units/day

      Let the number of officers be 'm'

      (40x Γ— 5)/100 = (2x Γ— m Γ— 2)/100

      β‡’ 4m = 200

      β‡’ m = 50

      Therefore, 50 senior officers are needed to complete the reports in 2 days.

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