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Q:

The average of 15 numbers is 7. If the average of the first 8 numbers be 6.5 and the average of last 8 numbers be 9.5, then the middle number is 

  • 1
    23
  • 2
    18
  • 3
    20
  • 4
    21
  • Show Answer
  • Workspace

Answer : 1. "23 "

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