I attempted the following problem and came to the following conclusion. The question was asking the probability that either a jet fire or flash fire occurs.
EVENT A=ignites immediately (jet fire)0.01
EVENT B=delayed ignition (flash fire) 0.01
The question is asking for union of these two events right?
since the two events are mutually exclusive we can conclude that P(AnB)=0
which leaves that P(AUB)=0.01+0.01=0.02
I keep getting told by my peers that I'm wrong but I don't know why. Is there something wrong about my approach?