A

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Q. 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

  • (A) 10.5
  • (B) 11.5
  • (C) 12.5
  • (D) 13.5
  • Correct Answer - Option(B)
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  • Filed under category Math
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Explanation by: Admin

Middle numbers = [(10.5 x 6 + 11.4 x 6) - 10.9 x 11] = (131.4 - 119-9) = 11.5.

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