document.write( "Question 674007: Four commuter trains and five express buses depart from city A to City B in the morning, and three commuter trains and four express buses operate on the return trip in the evening. In how many ways can a commuter from City A to City B complete a daily round trip via bus and/or train? \n" ); document.write( "
Algebra.Com's Answer #418974 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Four commuter trains and five express buses depart from city A to City B in the morning, and three commuter trains and four express buses operate on the return trip in the evening. In how many ways can a commuter from City A to City B complete a daily round trip via bus and/or train? \n" ); document.write( "--- \n" ); document.write( "The commuter can go from A to B in 9 ways, \n" ); document.write( "and can go from B to A in 7 ways. \n" ); document.write( "---- \n" ); document.write( "# of ways to make the roundtrip = 9*7 = 63 \n" ); document.write( "================== \n" ); document.write( "cheers, \n" ); document.write( "Stan H. \n" ); document.write( "===================== \n" ); document.write( " |