If you truly believe that there is a single formula for probability problems and your test is tomorrow, then stick a fork in yourself -- you are done. I would take a pass on this round of the test then go back and re-learn what you are required to know for probability for this test. Also, next time you post, read the instructions. Ask ONE specific question showing the work you have done so far.
John
My calculator said it, I believe it, that settles it
