Hi,

Suppose P(A)= 1/3, P(A or B)= 1/2, and P (A intersection B)= 1/10.

Note: P(A or B) = P(A) + P(B) - P(A and B)

             

          = P(B)

                         22/30 = P(B)



 P (A') = 1 - 1/3

 P( B)  =  11/15

 P( B')  = 1 - 11/15        

         

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