## Answers

4.3)

According to the question,

a)

Venn diagram is given by:

b)

From the given information, P(A) = 0.16, P(B) = 0.20,

c)

Required probability =

d)

Required probability =

P(A) = 0.16, P(B) = 0.20, P(ANB) = 0.12

Current Smoker Heart Attack 16% 20% 12%

P(AB) = P(ANB) = 0.12

P(AB) = P(B)- P( A B) = 0.20 -0.12 = 0.08

P( B A) P(BA) = ? PA 0.12 2 = 0.75 0.16

P(BNA) P(BA) = ? P(A) P(B) - P(BNA) 1 - P(A) 0.20 - 0.12 -= 0.0952 1- 0.16

.
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