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Ex 13.1
Ex 13.1, 2
Ex 13.1, 3 Important
Ex 13.1, 4 You are here
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
Last updated at March 16, 2023 by Teachoo
Ex 13.1, 4 Evaluate P(A ∪ B), if 2P(A) = P(B) = 513 and P(A|B) = 25 Given, 2P(A) = P(B) = 513 So, P(A) = 12 × 513 = 526 & P(B) = 513 Also, P(A|B) = 25 We know, P(A|B) = 𝑃(𝐴 ∩ 𝐵)𝑃(𝐵) 25 = 𝑃(𝐴 ∩ 𝐵) 513 P(A ∩ B ) = 25 × 513 P(A ∩ B ) = 𝟐𝟏𝟑 Also, P(A ∪ B) = P(A) + P(B) – P(A ∩ B) = 526 + 513 - 2 13 = 526 + 313 = 526 + 626 = 1126 ∴ P(A ∪ B) = 𝟏𝟏𝟐𝟔