document.write( "Question 255801: How many even four-digit numbers can you form from the digits 1, 2, 3, and 5 where no digit is used twice? \n" ); document.write( "
Algebra.Com's Answer #188037 by solver91311(24713)![]() ![]() You can put this solution on YOUR website! \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Since the formed number has to be even, it must end in 2, so all you need is how many ways are there to arrange the the other three digits -- three ways to select the first one times two ways to select the second one times one way to select the 3rd one. All in all, 6.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "John \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |