**Credit Weight:** 0.5 **Prerequisite(s):** MHF4U or permission of the Chair of the Department **Description**: Sets, logic, and functions; Boolean Algebras, Algorithms; Basic counting principles; permutations and combinations; discrete probability, recurrence relations; principle of inclusion and exclusion; pigeonhole principle; graph theory. **Offering:** 3-1; 0-0 **Notes:** Students who have previous credit in Mathematics 1281 may not take Mathematics 1271/1272 for credit.