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Q: The average of 15 numbers is 45. The average of first 6 numbers is 42 and Average of last 6 numbers is 43. 7th number is twice than 8th number, but 5 more than 9th. What is the average of 7th and 9th number?
  • A. 65.5
  • B. 64
  • C. 53.2
  • D. 65
Correct Answer: Option A -
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Explanations:

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