When Andy is wiring a house, he must know if the customer has a gas or electric dryer, gas or electric furnace, & gas or electric water heater. How many different wiring combinations are possible for the dryer, furnace, and water heater? In addition to the above wiring combinations, Andy's customers have 3 choices for ceiling lighting. How many wiring combinations are possible for the dryer, furnace, water heater, & ceiling lighting?

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So, to start, how many choices are available for the dryer, which is the first listed appliance?

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