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Employees of a Noida firm use the canteen, the gym and the library as shown. How many use the library and exactly one of the other two?

Competition practiceVenn Diagrams
  • A19
  • B39
  • C14
  • D20

Step-by-Step Solution

Library with exactly one other = canteen-and-library only + gym-and-library only . 19 also adds the 5 who use all three, 39 is the whole Library circle, and 20 is library only.
Answer: C) 14

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