If P(A∪B)=P(A∩B)⇔ then show that relation between P(A) and P(B) is P(A)=P(B).
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Solution
P(A∪B)=P(A)+P(B)−P(A∩B) If P(A∪B)=P(A∩B) Then P(A) and P(B) are equal Since P(A∪B)=P(A∩B)⇒A and B are equal sets Thus P(A) and P(B) are equal to P(A∩B)