Need help ASAP

Question

Events A and B are dependent. P(A and B) =0.15, P(A/B) =0.4, P(B) =

Answer 1

By definition: P(A and B) = P(B) * P(A|B).

 

When you plug in the values given, you can then solve for P(B).

Answer 2

Hi Carol,

 

When two events, A and B, are dependent:

 

P(AlB) =P(A and B)/P(B)

 

0.4 = (.15) / P(B)

 

P(B) = (.15) / 0.4

 

P(B) = 3/8 = .375

 

hope this helps