Counting Principles

Mathematics — topic guides, questions, and exam chapters with this tag

Topic guide

Counting Principles — Fundamental Rule, Pigeonhole, Inclusion-Exclusion

Learn counting principles with clear explanations, worked examples, and practice problems.

Solved questions

Find number of ways to distribute 10 identical balls in 3 distinct boxes

easy

How many 3-digit numbers have all distinct digits

hard

In how many ways can 5 people sit around a circular table

hard