GMAT Problem Solving

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Source: GWD

Level: 3

A certain list consists of 21 different numbers. If n is in the list and n is 4 times the average (arithmetic mean) of the other 20 numbers in the list, then n is what fraction of the sum of the 21 numbers in the list?

  • A 42024
  • B 42010
  • C 42009
  • D 42115
  • E 42145

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