At a certain gas station, 40% of the customers use regular u…

Questions

At а certаin gаs statiоn, 40% оf the custоmers use regular unleaded gas (A1), 35% use extra unleaded gas (A2), and 25% use premium unleaded gas (A3).  Of those customers using regular gas, only 30% fill their tanks (event B).  Of those customers using extra gas, 60% fill their tanks, where as of those using premium, 50% fill their tanks.  What is the probability that the next customer will request extra unleaded gas and fill the tank?