The problem described by you is a classical combinatorics problem and is actually solved very easily, but if you are not strong in it, then, of course, you can use a special combination sum calculator online, which is programmed to solve such examples in a few seconds, such as this one https://www.calculator.io/combinations-calculator/.

Added a link.

The problem described by you is a classical combinatorics problem and is actually solved very easily, but if you are not strong in it, then, of course, you can use a special combination sum calculator online, which is programmed to solve such examples in a few seconds, such as this one https://www.calculator.io/combinations-calculator/.