text: sat math problem? there are 3 roads from plattsville to ocean heights and 4 roads from ocean heights to bay cover and back, passes through ocean heights in both directions, and does not travel any road twice, how many different routes for the trip are possible?   why is the answer 72? explain please. ... ____ .... _____  . / ........ &#92; ... / ........ &#92; p -------- oh ==== bc  . &#92; ____ / ... &#92; ____ /  going to bc there are 3 x 4 different ways = 12  going back again there are now only 3 x 2 different ways as you have already traversed one of the roads on each leg on the way down to bc  thus total number of different ways = 4 x 3 x 3 x 2 = 72