Question

p a intersection b c people to a minus b

Answer 1

P(B)=16∗P(A) ……( 1)

P(Ac∩Bc)=1−P(A∪B)=1−[P(A)+P(B)−P(À∩B)]

⇒13=1−P(A)−P(B)+16

⇒P(A)+P(B)=1+16−13=56

⇒P(A)+16∗P(A)=56

⇒6P(A)2−5P(A)+1=0

⇒6P(A)2−3P(A)−2P(A)+1=0

⇒[2P(A)−1][3P(A)−1]=0

⇒P(A)=12or 13