Formula for the Conditional Probability is: P ( A \ B ) = P ( A ∩ B ) / P ( B ) But it is not possible to have the probability greater than 1. 0 ≤ P ( n ) ≤ 1 So let`s assume that: P ( A ∩ B ) = 1320 and P ( B ) = 1325 P ( A \ B ) = 1320 / 1325 = 0.9962