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The average of 13 numbers is 48. If 77 is added to the set, what is the new average?

  1. 62.5
  2. 50.07
  3. 53.92
  4. 48

Answer

B. 50.07

Solution

Sum = 13 × 48 = 624. New sum = 701; new average = 701 ÷ 14 = 50.07.

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