Question 1184900
Probability of rain tomorrow is 0.75
If it rains, the probability of an accident is 0.50, so that is overall 0.375 probability for that outcome.
-
If it does not rain, with probability 0.25, there is 0.25 probability of an accident or 0.0625 probability for that outcome.
-
Add the two, and the probability of an accident tomorrow is 0.4375.

Can do a rough check: if it rains, the probability of an accident is 0.50, but if no rain, which is part of the possibility tomorrow, then the probability is less, and that will bring down the overall probability, skewed closer to 0.50 than 0.25 since there is a higher probability it will rain than not rain.