If the probability for \(A\) to fail is in an examination is \(0.20\) and that of \(B\) to fail is \(0.30\), then the probability that either \(A\) or \(B\) fails is
Answer & explanation
Correct answer: option 3
\(P(A \cup B)=P(A)+P(B)-P(A \cap B)\)
Correct answer: option 3