Combinations

I really like the previous posts because they explain what i cannot. So will do what I can to add to it.





We can also use pascals triangle to figure out combinations, the triangle has infinite amount of rows and can go on forever. If, for instance, we are trying to find 10_C_4, we would take the fourth entry in the tenth row which would come out to 210, so this means that there are 210 ways to choose 4 numbers out of a set of 10 numbers.

This can be done from either side and you should get the same answer.