At the certain gas station, 40% of the customers employ regular gas, 35% use plus, and 25% use premium.
Regular has users only fill 30% of their tanks. Plus gas users fill 60% of their tanks. Premium users fill 50%.
a) Determine the probability that a customer will use regular has and fill their tank?
b) Determine the probability that a customer fills their tank?
c) If customer fills their tank, compute the probability they selected premium gas?