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sha0403
event A and B in a sample space S have the following probabilities. P(A)=0.4,P(B')=0.3 and P(A intersect B)=0.2... Help me to find number of sample space?
What do you mean by "number of sample space"?
did u know abt it n(s) in probabilitty? that include all the value of data..
Oh, cardinal number. Generally, you would need more info than that to figure out the cardinal number exactly, but the minimum possible would be 10, I think.
Oh oh ohhhh nevermind. Disregard everything I"ve said so far, I get it now.
So P(B) is 0.3, P(A) = 0.4...wait a minute, those can't be the only events, right?
And just noticed it was P(B'), so P(B) is 0.7, which is even worse :/.
so,how we identified the n(s)?
Ok, actually, lets say they're not mutually exclusive events (normally that would be explicit, but oh well). So say A contains 4 events, and B contains 7. Their intersection contains 2. So there are 9 events: 4+7-2. Of course, it could be any multiple of 9 too.
Yeah, n(S)=9, I think that's what they're going for. Sorry I'm not exactly an expert here, but no one else is backing me up, so that's my best guess.
oh i think that 9 at first but i'm not confident..but after u say that,, i confident now..thank u very much k.. =)