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The average of 11 numbers is 50. The average of the first 6 numbers is 49 and the average of the last 6 numbers is 52. What is the sixth number?

Competition practiceAverages & Ages
  • A46
  • B60
  • C50
  • D56

Step-by-Step Solution

Total of all = 550; first six = 294 and last six = 312. The sixth number (counted in both) = 294 + 312 - 550 = 56.
Answer: D) 56

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