The probability that a train on a certain route arrives late on a given day is 0.35. What is the probability that the train does not arrive late on that day?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 0.65
The train either arrives late or does not, and never both, so the two probabilities add up to 1: P(not late) = 1 − P(late).
P(late) \(=0.35\)
P(not late) \(=1-0.35=0.65\)