The average of 11 numbers is 10 9 If the average…

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The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :

  1. A. 11
  2. B. 11.3
  3. C. 11.4
  4. D. 11.5

Answer: Option D

Here is complete explanation of The average of 11 numbers is 10 9 If the average….

Solution(By ExamCraze Team)

Middle number
= [(10.5 × 6 + 11.4 × 6) - 10.9 × 11]
= (131.4 - 119.9)
= 11.5

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