Massachusetts Institute of Technology: Srini Devadas and Eric Lehman's "Counting II" and "Counting III"
In "Counting II", read Section 1.3, "Permutations." In "Counting III", read Section 1.3, "Combinations" and Section 2, "Binomial Theorem."
In "Counting II", read Section 1.3, "Permutations." In "Counting III", read Section 1.3, "Combinations" and Section 2, "Binomial Theorem."