SOLUTION: events a and b are independent. P(A) =9/20 P(A and B)=117/400 P(B)?
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Question 1115534: events a and b are independent. P(A) =9/20 P(A and B)=117/400 P(B)?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
events a and b are independent. P(A) =9/20 P(A and B)=117/400, P(B)= ?
If A and B are independent, P(A and B) = P(A)*P(B)
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Equation:
P(A)*P(B) = 117/400
(9/20)*P(B) = 117/400
P(B) = [117/400]/[9/20] = 117/400*(20/9) = 117/(20*9) = 117/118
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Cheers,
Stan H.
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