Question

Probability

Can someone please explain to me what is this:
http://screencast.com/t/M53ATdxm5

Is it some sort of formula ?

Answer 1

yes it is a formula @Christos

Answer 2

can you please tell me what kind of formula is this. Can you generalize?

Answer 3

i think it is for finding the probability of the common elements of S and L

Answer 4

Conditional probability!
\[P(a\mid b) = \dfrac{P(a \cap b)}{P(b)}\]

Answer 5

\(P(a\mid b)\) is read as "Probability of event \(a\) given that event \(b\) already happened"