Basic Probability--what is it?
www.mathsisfun.com/data/probability.html
The Fundamental Counting principle
www.mathsisfun.com/data/basic-counting-principle.html
Independent probability
www.mathsisfun.com/data/probability-events-independent.html
Dependent probability
https://www.mathgoodies.com/lessons/vol6/dependent_events
Permutations and Combinations
www.mathsisfun.com/combinatorics/combinations-permutations.html
http://www.mathwords.com/p/permutation_formula.htm
Challenging Probability Problems--Probability with Repetition
http://www.coolmath.com/algebra/20-combinatorics/04-permutations-repeats-reruns-01
www.mathsisfun.com/data/probability.html
The Fundamental Counting principle
www.mathsisfun.com/data/basic-counting-principle.html
Independent probability
www.mathsisfun.com/data/probability-events-independent.html
Dependent probability
https://www.mathgoodies.com/lessons/vol6/dependent_events
Permutations and Combinations
www.mathsisfun.com/combinatorics/combinations-permutations.html
http://www.mathwords.com/p/permutation_formula.htm
Challenging Probability Problems--Probability with Repetition
http://www.coolmath.com/algebra/20-combinatorics/04-permutations-repeats-reruns-01