Math Is Fun Forum

Macy

Guest

probability

Hi All,

Two events A and B are independent events. Pr (A/B) = 3/4. Pr (B) = Pr (A' intersect B'). Find Pr(B)?

Any idea?

soroban

Member

Registered: 2007-03-09

Posts: 452

Re: probability

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bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: probability

Hi Macy;

If the two events A and B are independent then,

P(A|B) = P(A) = .75 So you know that P(A) = .75

Now all you have to do is solve:

P(B) = 1 / 5.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Macy

Guest

Re: probability

I love all, guys.. for saving my paradol..

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: probability

Hi Macy;

Glad to help!

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.