Add modular combination, Issue #10

[GnsP]

Description of new feature, or changes

Added modular combination in Maths, (issue #10 : Combination Modular)

Checklist

• [x] Your branch is up-to-date with the base branch
• [x] You've included at least one test if this is a new feature
• [x] All tests are passing

Related Issues and Discussions

issue #10 : Combination Modular

People to notify

@manrajgrover