Question 1206166
<pre>

I'm trying to guess what you meant. 
I'm guessing you had 3 overlapping sets (circles),
labeled A,B,C with 7 regions numbered 1 to 7.

{{{drawing(650,650,-4,4,-4,4,

circle(0,-.5,2),
locate(-2.3,2,"P(1)=0.1"),

locate(0,-3,C),
locate(-.45,-1,"P(7)=0.1"),
locate(.6,.4,"P(6)=0.5"),
circle(sqrt(2),sqrt(2),2),
locate(-3.4,2.5,A),
circle(-sqrt(2),sqrt(2),2),
locate(3.4,2.5,B),
locate(-1.5,.5,"P(4)=0.05"),
locate(-.4,2,"P(2)=0.1"),
locate(1.8,2,"P(3)=0.1"),
locate(-.4,1.1,"P(5)=0.05") )}}}

P(A∪B) = P(1) + P(4) + P(2) + P(5) + P(3) + P(6) =
0.1 + 0.05 + 0.1 + 0.05 + 0.1 + 0.5 = 0.9

P(4) = 0.05  (That's given above. Don't know why they would ask that!!!)

P(A∩B) = P(2) + P(5) = 0.1 + 0.05 = 0.15

P(A∪A) = P(A) = P(1) + P(2) + P(4) + P(5) = 
0.1 + 0.1 + 0.05 + 0.05 = 0.3

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I have no idea what the rest of what you wrote meant. I
can't even guess. 

A=1,5,6  but A isn't those regions!
B=4,7    but B isn't those regions!
A/B=2,3  Is that the difference of A minus B?  If so that is not 2,3.

Sorry, We have no idea of what that could mean.

Edwin</pre>