Dr. J introduces the four basic types of counting: combinations and permutations both with and without replacement. Combinations occur when order does not matter while permutations occur when order does matter. The video shows examples of using formulas to perform the counting for each the four basic types of counting.
Slides: [ Ссылка ]
00:39 - Counting basics
02:13 - Counting formulas
04:20 - Combination with replacement (unique Yahtzee rolls)
06:08 - Combination without replacement (lottery draws)
07:32 - Permutation with replacement (passwords)
08:47 - Permutation without replacement (cross-over clinical trials)
10:22 - Summary
