Question 674672
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
{{{drawing(300,300,-4,4,-5,4,
rectangle(-4,-1.6,4,4), locate(-2,1.8,30),locate(1.5,1.7,90),
 locate(-3.5,2.5,A), locate(-.1,1.8,20),
circle(-sqrt(2),sqrt(2),2),locate(3.5,2.5,B),
circle(sqrt(2),sqrt(2),2))}}}
 1) n (A) 50
 2) n (B) 110
 3) p (A) 50/140
 4) p (B) 110/140
 5) p (A&#448;B) {{{(20/140)/(110/140) = 20/110}}}
 6) p (B&#448;A) {{{(20/140)/(50/140) = 20/50}}}
P(X|Y) = P(X and Y)/P(Y)