Which of these is always true for any two events A,BA, BA,B with P(B)>0P(B) > 0P(B)>0?
Both a and b
P(A∣B)+P(Ac∣B)=1P(A|B) + P(A^c|B) = 1P(A∣B)+P(Ac∣B)=1
P(A∣B)≥P(A∩B)P(A|B) \geq P(A \cap B)P(A∣B)≥P(A∩B)
P(A∣B)≤P(A)P(A|B) \leq P(A)P(A∣B)≤P(A)