Algebra Q#44
- Option : C
- Explanation : P(A) = 0.3 and P(AUB) = 0.8 .
Since, A and B are independent events.
Let P(B) = x
Then, P(A∩B) =P(A) P(B)
= 0.3 × x = O.3x
Again, by addition theorem
P(AUB) = P(A) + P(B) - P(A∩B).
⇒0.8 = 0.3 + x - O.3x ⇒ 0.5 = 0.7x
X=5/7
