1. ## Conditional Probability

Hello,

I was wondering if someone can help me understand this...

so in order to solve P(A|B) you must know the value of P(A and B)?

How do you get P(A and B), is it the multiplicative law?

I'm just confused with all the formulas in the book.

Thanks,
-Flip

2. Originally Posted by l flipboi l
so in order to solve P(A|B) you must know the value of P(A and B)? How do you get P(A and B), is it the multiplicative law?
The general answer is simply that some information in the actual problem must give you that information.
If you give us an actual question, the we can show you how that works.
There is no way to do it in the abstract: so give an actual question.

3. Thanks, I'll let you know when I find one.