Combinations with Repetitions in Discrete Math
Computing the number of possible combinations with repetitions allowed is typically the most challenging formula for many people to wrap their minds around. In this lesson, we look at a different way to model the problem in order to arrive at the final formula.
Timestamps
00:00 | Intro
03:28 | Why Simply Taking Order out of Sequences Doesn't Work (3 Coin Tosses)
05:38 | Description of Model Used to Derive Combinations with Repetition Formula
10:13 | Deriving the Combinations with Repetition Formula
15:07 | Notation for "n Choose r"
15:41 | Example of "4 Choose 3" with Repetition (4-Sided Dice)
18:26 | Example of "7 Choose 5" with Repetition
Hashtags
#counting #combination #repetition
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