Khan Academy on a Stick

Example: Lottery probability

What is the probability of winning a 4-number lottery?

Probability using combinatorics

Example: Probability through counting outcomes
Example: All the ways you can flip a coin
Getting exactly two heads (combinatorics)
Probability and combinations (part 2)
Probability using combinations
Exactly three heads in five flips
Example: Different ways to pick officers
Example: Combinatorics and probability
Example: Lottery probability
Mega millions jackpot probability
Generalizing with binomial coefficients (bit advanced)
Conditional probability and combinations
Conditional probability warmup
Birthday probability problem

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This collection was created November 2014.