Ex 13.1, 17 - Chapter 13 Class 12 Probability (Term 2)
Last updated at Aug. 11, 2021 by
Last updated at Aug. 11, 2021 by
Transcript
Ex 13.1, 17 If A and B are events such that P(A|B) = P(B|A), then (A) A β B but A β B (B) A = B (C) A β© B = Ο (D) P(A) = P(B)Given P(A|B) = P(B|A) (π(π΄ β© π΅))/(π(π΄)) = (π(π΅ β© π΄))/(π(π΅)) (π(π΄ β© π΅))/(π(π΄)) = (π(π΄ β© π΅))/(π(π΅)) 1/(π(π΄)) = 1/(π(π΅)) β΄ "P(A) = P(B)" So, option (D) is correct (Since "P(B"β©"A)" = "P(A"β©"B) ")
Conditional Probability - Values given
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