Question

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?

Answer 1

What do you mean by "number of sample space"?

Answer 2

did u know abt it n(s) in probabilitty? that include all the value of data..

Answer 3

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.

Answer 4

Oh oh ohhhh nevermind. Disregard everything I"ve said so far, I get it now.

Answer 5

So P(B) is 0.3, P(A) = 0.4...wait a minute, those can't be the only events, right?

Answer 6

And just noticed it was P(B'), so P(B) is 0.7, which is even worse :/.

Answer 7

so,how we identified the n(s)?

Answer 8

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.

Answer 9

you mean n(s) is 9?

Answer 10

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.

Answer 11

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.. =)