How many integer solutions || Bijection Principle, Combinatorics || ISI Entrance TOMATO Obj 22

How to find the number of positive integer solutions of x + y + z = 10? We learn bijection principle from combinatorics and how to apply it.

Problem useful for I.S.I B.Stat B.Math Entrance, CMI Entrance and Math Olympiad

[priyap]

Very less people make video in English of this quality in India. Would love to have lot of video of this kind.

[unkown]

What if the question was asked for x+y+z+w=10?

[rohitsah]

Ans of 2nd question - 10 balls and 2 bars need to permute
So, (10+2)!/10!*2! = 66

[iconiclearn]

There is too much noise in background and last question answer is 12 C 2 =66

[chakichan_uwu]

Sorry but I couldn't understand a thing