A merchant imported sugar stews in two ships. If the probability of the first ship arriving on time is 60%, the probability of the second ship arriving on time is 50%, and the probability of both arriving together is 30%, then what is the probability of at least one of the two ships arriving on time?
Actually, my 10th grade sister asked me about this and I remember nothing of probability, so I would like to kindly ask for a simple and sufficient explanation.
Actually, my 10th grade sister asked me about this and I remember nothing of probability, so I would like to kindly ask for a simple and sufficient explanation.