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permutations and combinations

MA Economics Entrance Coaching Forums Subject forums permutations and combinations

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  • #512


    a seven digit no divisible by 9 is to formed by using 7 numbers out of {1,2,3,4,5,6,7,8,9} the no of ways in which this csn be done

  • #519


    Shruti, can you please move this to the “Math” forum? If you’re unable to move it, please create this topic in the math forum.


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