defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Probability Conditional Probability
যদি P(B) = \(\frac{3}{5}\), P(A ∣ B) = \(\frac{1}{2}\) এবং P(A ∪ B) = \(\frac{4}{5}\) হয়, তাহলে P(A ∪ B)'+ P(A' ∪ B) = ?
1
\(\frac{1}{5}\)
2
\(\frac{4}{5}\)
3
\(\frac{1}{2}\)
4
1