A

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Q. The average of 11 results is 50. If the average of the first six results is 49 and that of the last six is 52, the sixth no. is

  • (A) 48
  • (B) 50
  • (C) 52
  • (D) 56
  • Correct Answer - Option(D)
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  • Filed under category Math
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Explanation by: Admin
Here , Sum of 11 results = 50 × 11 = 550
Sum of the first six results = 49 × 6 = 294
and Sum of the last six results = 52 × 6 = 312
∴ Sixth result = Sum of the first six results + Sum of the last six results – Sum of 11 results
Sixth result = 294 + 312 – 550 = 56

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