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?
Watch the first hint
Other useful links:-
Subscribe to Cheenta at Youtube
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?
Watch the first hint
Other useful links:-
Subscribe to Cheenta at Youtube
