The average of ten numbers is 11. The average of six of these numbers is 13. The average of the remaining numbers is x, then
A) 6x=50 B) 3x<20 C) 40>4x D) The relationship cannot be determined.

• The correct answer is Option (C).
  Avg.(ten numbers) = 11 => sum (ten numbers) = 110
  Avg.(six numbers) = 13 => sum (six numbers) = 78 (since, 13*6 = 78)
  Avg.(remaining four numbers) = x = (110 -78) / 4 = 8
  Therefore x
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