Prosze o pomoc Hektor: A , B ⊂ Ω P(A) = 1/4 P(B) = 1/3 P(A iloczyn B) = 1/5 OBLICZ P(A' / B) =?

@Basia:

	P(A'nB)
P(A'/B) =
	P(B)

(A'nB)u(AnB) = (A'uA)nB = ΩnB = B A'nB i AnB są rozłączne P[(A'nB)u(AnB)] = P(B) P(A'nB)+P(AnB) = P(B) P(A'nB) = P(B)−P(AnB) = ¹₃ − ¹₅ = ⁵⁻³₁₅ = ²₁₅

	P(A'nB)		215
P(A'/B) =		=		= 215*3 = 25
	P(B)		13

Hektor: Dziękuje Basiu