document.write( "Question 26342: how many 6 number combinations will be made from 1 2 3 4 5 6 7 8 9, where 1 2 and 3 must appear on the 6-number combination? \n" ); document.write( "
Algebra.Com's Answer #14172 by venugopalramana(3286)![]() ![]() You can put this solution on YOUR website! 1,2 AND 3 MUST APPEAR IN THE COMBINATION. \n" ); document.write( "SO WE NEED TO SELECT ANOTHER 3 NUMBERS ONLY OUT OF REMAINING 6 NUMBERS WHICH CAN BE DONE IN 6C3 WAYS \n" ); document.write( "6C3=6*5*4/(3*2*1)=20 \n" ); document.write( " \n" ); document.write( " |