A seemingly trivial idea that turns out to be a powerful idea for solving problems
lesson notes:06 pigeonhole principle
A seemingly trivial idea that turns out to be a powerful idea for solving problems
lesson notes:06 pigeonhole principle
How does the number of arrangements change when objects are placed in a line rather than a circle?
lesson notes:05 arrangements in a circle
Deciding what approach to take when solving different probability problems
lesson notes:04 probability & counting techniques
Selecting groups of objects where the arrangement of the objects is not important
lesson notes:03 combinations
Arranging objects when some of them are the same
lesson notes:02 permutations II