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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 __

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 __ Correct Answer 24

The 6th number is = (50 × 9) – (5 × 54 + 3 × 52) = 450 – 426 = 24. Ans: D

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