SOLUTION: Events A and B are disjoint.P(A) =40/61 and P(B) = 2/61/ Find P(A or B) Thank you for your answers. Answers Preferred from Checkley77,Solver 91311,Stanbon,or Fombitz,Thanks.

Algebra ->  Probability-and-statistics -> SOLUTION: Events A and B are disjoint.P(A) =40/61 and P(B) = 2/61/ Find P(A or B) Thank you for your answers. Answers Preferred from Checkley77,Solver 91311,Stanbon,or Fombitz,Thanks.      Log On


   

Question 136534: Events A and B are disjoint.P(A) =40/61 and P(B) = 2/61/
Find P(A or B)

Thank you for your answers. Answers Preferred from Checkley77,Solver 91311,Stanbon,or Fombitz,Thanks.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Events A and B are disjoint.P(A) =40/61 and P(B) = 2/61/
Find P(A or B)
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Formula: P(A or B) = P(A) + P(B) - P(A and B)
But A and B are disjoint so P(A and B) = 0
So, P(A or B) = P(A) + P(B) = (40/61) + 2/61 = 42/61
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Cheers,
Stan H.