I need to prove that

Using a Venn diagram, this proof is so trivial but how do I prove this mathematically?

So far I have

where S is the sample space

But now I'm stuck...

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- March 17th 2009, 08:49 AMVENIBasic proof
I need to prove that

Using a Venn diagram, this proof is so trivial but how do I prove this mathematically?

So far I have

where S is the sample space

But now I'm stuck... - March 17th 2009, 11:14 AMclic-clac
Hi

You can prove it with two inclusions. One is quite simple:

Do you see why?

Then take . What does it mean for x?