Imagine you have balls in n different colors. For instance, say you have: 3 colors (red, blue, and green), With 4, 5, and 8 balls of each color, respectively.You need to pick exactly some balls like(5) balls in total, and the selection can include balls of any color in any combination. Examples of valid selections are:
4 red, 1 blue, 0 green (4+1+0),
3 red, 2 blue, 0 green (3+2+0),
0 red, 0 blue, 5 green (0+0+5),
And so on.
The task is to find all possible ways to select 5 balls under these conditions. and some more question!