A combination selects objects without regard to order.
What Is Combination?
A combination selects objects without regard to order.
Examples of Combination
1
Choosing 2 students from 5 gives C(5,2)=10 choices.Formula and Key Points
Formula / rule
C(n,r)=n!/[r!(n−r)!]
- Know the definition and standard notation for Combination.
- Be able to recognise or compute combination in a small example.
- Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
Why This Matters in Computer Science
Used in algorithm proofs, counting, recurrence analysis, data structures and theoretical computer science. Used in subset selection, probability, testing and combinatorial algorithms.
Related Math Terms
Combination: Frequently Asked Questions
What is Combination?
A combination selects objects without regard to order.
Why is Combination useful in computer science?
Used in algorithm proofs, counting, recurrence analysis, data structures and theoretical computer science. Used in subset selection, probability, testing and combinatorial algorithms.