Khan Academy

Independent & dependent probability (K-A)

Probability without equally likely events (K-A)

The Monty Hall problem (K-A)

Three-pointer vs free-throw probability (K-A)

Factorial and counting seat arrangements (K-A)

Permutation formula (K-A)

Possible three letter words (K-A)

Ways to arrange colors (K-A)

Ways to pick officers (K-A)

Zero factorial or 0! (K-A)

Combination example: 9 card hands (K-A)

Combination formula (K-A)

Handshaking combinations (K-A)

Intro to combinations (K-A)

Exactly three heads in five flips (K-A)

Example: Combinatorics and probability (K-A)

Example: Different ways to pick officers (K-A)

Example: Lottery probability (K-A)

Generalizing with binomial coefficients (bit advanced) (K-A)

Getting exactly two heads (combinatorics) (K-A)

Mega millions jackpot probability (K-A)

Probability & combinations (2 of 2) (K-A)

Probability using combinations (K-A)

Probability with counting outcomes-vidoe (K-A)

Converting recursive & explicit forms of arithmetic sequences (K-A)