Ex 13.1, 5 - Chapter 13 Class 12 Probability (Term 2)
Last updated at May 25, 2021 by Teachoo
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Ex 13.1, 5
If P(A) = 6 11 , P(B) = 5 11 and P(A B) 7 11 , find
(i) P(A B)
P(A) = 6 11 , P(B) = 5 11 and P(A B) 7 11
Now,
P(A B) = P(A) + P(B) P(A B)
7 11 = 6 11 + 5 11 P(A B)
P(A B) = 11 11 7 11
P(A B) =
Ex 13.1, 5
If P(A) = 6 11 , P(B) = 5 11 and P(A B) 7 11 , find
(ii) P(A|B)
P(A|B) = ( ) ( )
= 4 11 5 11
=
Ex 13.1, 5
If P(A) = 6 11 , P(B) = 5 11 and P(A B) 7 11 , find
(iii) P(B|A)
P(B|A) = ( ) ( )
= ( ) ( )
= 4 11 6 11
= 4 6
=
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