Last updated at May 25, 2021 by Teachoo

Transcript

Ex 13.1, 3 If P (A) = 0.8, P (B) = 0.5 and P(B|A) = 0.4, find (i) P(A โฉ B)P(A) = 0.8 , P(B) = 0.5 & P(B|A) = 0.4 Now, we know that P(B|A) = (๐(๐ต โฉ ๐ด))/(๐(๐ด)) 0.4 = (๐(๐ด โฉ ๐ต))/(๐(๐ด)) 0.4 = (๐(๐ด โฉ ๐ต))/(0. 8) P(A โฉ B) = 0.4 ร 0.8 P(A โฉ B) = 0.32 Ex 13.1, 3 If P (A) = 0.8, P (B) = 0.5 and P(B|A) = 0.4, find (ii) P(A|B)P(A|B) = (๐(๐ด โฉ ๐ต))/(๐(๐ต)) = 0.32/0.5 = 32/50 = 0.64 โด P(A|B) = 0.64 Ex 13.1, 3 If P (A) = 0.8, P (B) = 0.5 and P(B|A) = 0.4, find (iii) P(A โช B)P(A โช B) = P(A) + P(B) โ P(A โฉ B) = 0.8 + 0.5 โ 0.32 = 1.3 โ 0.32 = 0.98 โด P(A โช B) = 0.98

Ex 13.1

Ex 13.1, 1

Ex 13.1, 2

Ex 13.1, 3 Important You are here

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

Chapter 13 Class 12 Probability (Term 2)

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About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.