PA 6 PB 3 PB A 5 11 PA or B a 5 b 4 c 15 d 6 e 9Solutio

P(A) = .6, P(B) = .3, P(B | A) = .5

11. P(A or B) =

a. .5

b. .4

c. .15

d. .6

e. .9

Solution

P(A and B)=P(B given A)*P(A)

=0.6*0.5=0.3

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

=0.6+0.3-0.3

=0.6