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Bijection Principle from I.S.I. Entrance

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    Try the problem


    This problem of Bijection Principle is from B.Stat, B.Math Entrance.

    How many natural numbers less that $ 10^8 $ are there, whose sum of digits equals 7?


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    Content
     [hide]

      Try the problem


      This problem of Bijection Principle is from B.Stat, B.Math Entrance.

      How many natural numbers less that $ 10^8 $ are there, whose sum of digits equals 7?


      Subscribe to Cheenta at Youtube


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