Ex 13.1, 17 (MCQ) - Chapter 13 Class 12 Probability (Term 2)
Last updated at Aug. 11, 2021 by Teachoo
Ex 13.1
Ex 13.1, 2
Ex 13.1, 3 Important
Ex 13.1, 4
Ex 13.1, 5
Ex 13.1, 6 (i)
Ex 13.1, 6 (ii) Important
Ex 13.1, 6 (iii)
Ex 13.1, 7 (i)
Ex 13.1, 7 (ii)
Ex 13.1, 8
Ex 13.1, 9
Ex 13.1, 10 (a) Important
Ex 13.1, 10 (b) Important
Ex 13.1, 11
Ex 13.1, 12 Important
Ex 13.1, 13 Important
Ex 13.1, 14
Ex 13.1, 15
Ex 13.1, 16 (MCQ) Important
Ex 13.1, 17 (MCQ) Important You are here
Last updated at Aug. 11, 2021 by Teachoo
Ex 13.1, 17 If A and B are events such that P(A|B) = P(B|A), then (A) A ⊂ B but A ≠ B (B) A = B (C) A ∩ B = φ (D) P(A) = P(B)Given P(A|B) = P(B|A) (𝑃(𝐴 ∩ 𝐵))/(𝑃(𝐴)) = (𝑃(𝐵 ∩ 𝐴))/(𝑃(𝐵)) (𝑃(𝐴 ∩ 𝐵))/(𝑃(𝐴)) = (𝑃(𝐴 ∩ 𝐵))/(𝑃(𝐵)) 1/(𝑃(𝐴)) = 1/(𝑃(𝐵)) ∴ "P(A) = P(B)" So, option (D) is correct (Since "P(B"∩"A)" = "P(A"∩"B) ")