Probability Questions: urgent help needed I am having a pretty hard time differentiating between the difference between these two things: Mutually Exclusive, and Independant. When do you know which formula to use? The same thing applies with *And* and *Or* problems. I understand how to use the formulas, but I'm having a hard time deciding which category a problem actually goes into. Without knowing which category it goes into all my actualy knowledge is pretty much useless! Please help me, I have a math test on this tommorow.