9. Two mark exercise problem IV

The probability of happening of an event \(A\) is \(0.5\) and that of \(B\) is \(0.3\). If \(A\) and \(B\) are mutually exclusive events, then find the probability that neither \(A\) nor \(B\) happen.

 

Answer:

 

\(P(\text{neither} \ A \ \text{not} \ B) =\)