Civil Service Exam Reviewer · Averages · medium

The average of 4 numbers is 51. If 65 is added to the set, what is the new average?

  1. 53.8
  2. 58
  3. 67.25
  4. 51

Answer

A. 53.8

Solution

Sum = 4 × 51 = 204. New sum = 269; new average = 269 ÷ 5 = 53.8.

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