# indicated Probability

• July 21st 2012, 05:43 PM
ShawniceAllen
indicated Probability
Find indicated probability. If P(A) = 0.5, P(B) = 0.4, and P(A or B) = 0.7, find P(A and B). I dont gwt it help please!!! (Worried)
• July 21st 2012, 06:01 PM
Plato
Re: indicated Probability
Quote:

Originally Posted by ShawniceAllen
Find indicated probability. If P(A) = 0.5, P(B) = 0.4, and P(A or B) = 0.7, find P(A and B). I dont gwt it help please!!! (Worried)

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$P(A\cup B)=P(A)+P(B)-P(A\cap B)$. Solve for $P(A\cap B)$.