Counting
This is a free zero to hero course on IB Analysis and Approaches HL permutation and combination.
There are several sections, or collections of problems, in increasing complexity. Each section is centered on a single aspect in which the questions are also in increasing difficulty. It is best that you complete a section as best as you can, before moving on to the next.
Give your answers as exact integers; no rounding, no scientific notation. Solutions are only given if you get an answer right, and go into the theory. This is to encourage you to earnestly attempt each question without time constraints, and to discover many ideas on your own. Hints are provided for the trickier problems. Questions rarely involve more than 2 cases.
This supplements the Counting notes.
This is a preview version. Expect errors and more problems to be released in the next few days.