A

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Q. The average of nine numbers is 50. The average of the first five numbers is 54 and that of the last three numbers is 52. Then the sixth number is

  • (A) 34
  • (B) 24
  • (C) 44
  • (D) 30
  • Correct Answer - Option(B)
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  • Filed under category Math
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Explanation by: Admin

Required number = (Sum of all numbers) - [(Sum of first 5 numbers) + (Sum of last 3 numbers)
= 50 x 9 - ( 54 x 5 + 3 x 52)
= 450 - (270 + 156) = 450 - 426 ≈ 24

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