SOLUTION: Given that P(A or B) = 1/4, P(A) = 1/7, and P(A and B) = 1/8, find P(B)

Question 1159974: Given that P(A or B) = 1/4, P(A) = 1/7, and P(A and B) = 1/8, find P(B)
Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!

P(A or B) = P(A) + P(B) - P(A and B)
     |    |  |   |  |   |     | 
    1/4   = 1/7  +  x   -    1/8

 

Multiply through by LCD = 56









Edwin

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