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Q:

The average of some natural numbers is 15. If 30 is added to first number and 5 is subtracted from the last number, the average become 17.5. then the numbers of natural numbers is :

  • 1
    10
  • 2
    20
  • 3
    30
  • 4
    15
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Answer : 1. "10"

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Maths Number System Questions

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