CBSE Class 12 Sample Paper for 2019 Boards

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Question 12 (Or 2nd) - CBSE Class 12 Sample Paper for 2019 Boards - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at July 25, 2026 by

Question 12 (OR 2 nd question)

If P(A) = 0.6, P(B) = 0.5 and P(A|B) = 0.3, then find P(A āˆŖ B).

If P(A) = 0.6, P(B) = 0.5 and P(A|B) = 0.3, then find P(A U B).

Question 12 (Or 2nd) - CBSE Class 12 Sample Paper for 2019 Boards - Part 2

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Question 12 (OR 2nd question) If P(A) = 0.6, P(B) = 0.5 and P(A|B) = 0.3, then find P(A āˆŖ B). Given, P(A) = 0.6 P(B) = 0.5 & P(A|B) = 0.3 Now, P(A|B) = (š‘ƒ(š“" āˆ© " šµ))/(š‘ƒ(šµ)) 0.3 = (š‘ƒ(š“" āˆ© " šµ))/0.5 0.3 Ɨ 0.5 = P (A āˆ© B) 3/10 Ɨ 5/10 = P (A āˆ© B) 15/100 = P (A āˆ© B) 0.15 = P (A āˆ© B) P (A āˆ© B) = 0.15 Now, P(A āˆŖ B) = P(A) + P(B) ā€“ P(A āˆ© B) = 0.6 + 0.5 ā€“ 0.15 = 1.1 ā€“ 0.15 = 0.95

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