document.write( "Question 482573: A combination lock is set up in the office. The keypad is set up with numbers 0-9 and you know the combination is a 4 digit combo. You also know that numbers are not repeated in the combination. How many different combinations of 4 can be created?\r
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Algebra.Com's Answer #547341 by tmwilliamlin168(27)![]() ![]() ![]() You can put this solution on YOUR website! You start of with 10 possible numbers for the first number (0~9) \n" ); document.write( "One of them is used so the second number only has 9 possibilities \n" ); document.write( "8 for the third, and 7 for the last \n" ); document.write( "If you multiply the numbers it will be the number of possibilities \n" ); document.write( "10*9*8*7=5040 \n" ); document.write( " |