Question
If P( A) = 0.8, P(B) = 0.5 and P(B | A) = 0.4, find P (A ∪ B)
Solution
Here, P(A) = 0.8, P(B) = 0.5, P(B | A) = 0.4
Now, P(A ∪ B) = 
= 0.98
