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# S1-probability

Maths and statistics discussion, revision, exam and homework help.

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1. S1-probability
Hi can someone explain to me question 2)b) on the jan 2012 paper ~???P(B) or the whole part getting really stressed with that question dont get the logic.
2. Re: S1-probability
P(A u B)= P(A) + P (B) - P(A n B)

As the events are independent, P(A n B)= P(A) x P(B)

Hope that explains it.
3. Re: S1-probability
(Original post by nickss)
P(A u B)= P(A) + P (B) - P(A n B)

As the events are independent, P(A n B)= P(A) x P(B)

Hope that explains it.
thanks but then how did he get 3/4 ?
4. Re: S1-probability
(Original post by otrivine)
thanks but then how did he get 3/4 ?
5. Re: S1-probability
does anyone have the jan 2012 paper please?
6. Re: S1-probability
(Original post by AishaTara)
does anyone have the jan 2012 paper please?

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Last updated: May 16, 2012
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