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Seven numbers have a mean of 20. Dropping one of them brings the mean of the other six down to 19. Which number was dropped?

Competition practiceAverages & Ages
  • A26
  • B20
  • C19
  • D24

Step-by-Step Solution

Sum of seven = . Sum of six = . Dropped number = 140 − 114 = 26.
Answer: A) 26

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