

Subscribe to our Youtube Channel - https://you.tube/teachoo
Last updated at Feb. 15, 2020 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
About the Author