(I am not sure if this is the right section of the forum to post,I think it is)
Let's say there are 50 numbers starting from 1 to 50.They will be grouped like:
1 2 3 4
1 2 3 5
1 2 3 6
...
2 3 4 5
2 3 4 6
2 3 4 7
...
and end with:
47 48 49 50
I want to learn how many "1" number and "2" number(in the same combination) there are in the results.What would be the mathematical formula for calculating this?
