E4.Interpret+and+Compute+conditonal+probabilites

Conditional Probabilites

What is a conditional probability? the probability of an evenassuming that some other event has already occurred. ex: P(A / B) = P(A and B) __

P(B)

How do you solve conditional probabilites? Start with the multiplication rule 2 Divide both sides of equation P(A) Cancel P(A)'s on right side of equation Commute the equation Then you have solved the formula for conditional probability