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The average of 5 numbers is 12. If the average of 4 of these numbers is 13, the fifth number is _____?
  1. 10
  2. 8
  3. 12
  4. None of these
Explanation

Sum of 5 numbers = 5 × 12 = 60

Sum of 4 numbers = 4 × 13 = 52

Fifth number = 60 - 52 = 8


Last verified on 18-03-202

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