hasnain721
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conditional probability help please
Hi there,
I am doing s1 for this jan and i am finding it very difficult to cope up. Especially for probability. I have a cgp buk but stil its not very gud at probability. Here is a question from my text buk which i cud not understand : -
Two events A and B are such that P(A) = 3/4 , P(B l A) = 1/5 and P(B' l A') = 4/7. By use of a probability tree or other wise find :
a) P(A and B)
b) P(B)
c) P(A l B)
In addition, can some 1 suggest a gud buk for probability please.
P(B l A) = P(A intersection B) / P(A)
I got 'a' right by multiplying 3/4 by 1/5
Plz reply
Thanks
Hasnain Mir Mohammed
Homework Statement
Hi there,
I am doing s1 for this jan and i am finding it very difficult to cope up. Especially for probability. I have a cgp buk but stil its not very gud at probability. Here is a question from my text buk which i cud not understand : -
Two events A and B are such that P(A) = 3/4 , P(B l A) = 1/5 and P(B' l A') = 4/7. By use of a probability tree or other wise find :
a) P(A and B)
b) P(B)
c) P(A l B)
In addition, can some 1 suggest a gud buk for probability please.
Homework Equations
P(B l A) = P(A intersection B) / P(A)
The Attempt at a Solution
I got 'a' right by multiplying 3/4 by 1/5
Plz reply
Thanks
Hasnain Mir Mohammed