4018. The number of trucks passing along the highway on which the gas station stands is one of the cars passing along the same highway as 13:11. The probability that a truck will refuel is 0.1; for a passenger car, this probability is 0.2. A car drove up to the gas station for refueling. Find the probability that this is a truck.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)