In a certain factory there are five workers A B C…

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In a certain factory there are five workers A, B, C, D and E. A can complete a work in 4 minutes, B in 5 minutes, C in 6 minutes, D in 10 minutes and E in 12 minutes. The average number of units of work completed per worker per minute will be-

  1. A. 0.16
  2. B. 0.172
  3. C. 0.80
  4. D. 0.87

Answer: Option A

Here is complete explanation of In a certain factory there are five workers A B C….

Solution(By ExamCraze Team)

Number of units of work completed by the five workers in 1 minute:
$$eqalign{ & A to frac{1}{4}, cr & B to frac{1}{5}, cr & C to frac{1}{6}, cr & D to frac{1}{{10}}, cr & E to frac{1}{{12}} cr} $$
∴ Required average
$$eqalign{ & = frac{{left( {frac{1}{4} + frac{1}{5} + frac{1}{6} + frac{1}{{10}} + frac{1}{{12}}} right)}}{5} cr & = left( {frac{4}{5} times frac{1}{5}} right) cr & = frac{4}{{25}} cr & = 0.16 cr} $$

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