A

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Q. The average of 6 observation is 12. A new 7th observation is included and the new average is decrease by 1 , the seventh observation is ?

  • (A) 1
  • (B) 3
  • (C) 5
  • (D) 6
  • Correct Answer - Option(C)
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  • Filed under category Math
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Explanation by: Admin

Seventh observation = sum of 7 observations - sum of 6 observations = 7 x 11 – 6 x 12
= 5

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