Gives explanation and exercises to learn the addition rule of probability
Algebra Lab

In this video, Salman Khan of Khan Academy explains probability. Part 2 of 8.
Khan Academy

This shows examples and stepbystep instructions for using Calculator to find desired probability values.
MathBits

Excellent explanations and practice problems with "hidden" answers of problems dealing with permutations and combinations.
The Math Page

In this video, Salman Khan of Khan Academy explains probability. Part 7 of 8.
Khan Academy

In this video, Salman Khan of Khan Academy explains probability. Part 6 of 8.
Khan Academy

In this video, Salman Khan of Khan Academy explains probability. Part 5 of 8.
Khan Academy

In this video, Salman Khan of Khan Academy explains probability. Part 4 of 8.
Khan Academy

In this video, Salman Khan of Khan Academy explains probability. Part 1 of 8.
Khan Academy

This gives a general description of standard deviation.
Robert Niles
