conditional probability

Question

Hi,

Could you inform me please, how can I calculate conditioned probability of several events?

for example:

P (A | B, C, D) - ?

I know, that:

P (A | B) = P (A intersection B) / P (B)

But, unfortunately, I can't find any formula if an event A depends on several variables. Thanks in advance.

Answer 1

That's like P(A| (B intersect C intersect D)) which will be equal to P(A intersect B intersect C intersect D) / P(B intersect C intersect D) ....and you can simplify...