document.write( "Question 402052: Three coins are selected from nine coins: 3 dimes, 5 nickels, and 1 quarter. In how many ways can the selection be made so that the value of the coins chosen is at least 25 cents?\r
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document.write( "I couldn't figure out how to use a combination \n" );
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Algebra.Com's Answer #284454 by edjones(8007)![]() ![]() You can put this solution on YOUR website! nCr=Combination of n things taken r at a time. \n" ); document.write( "1C1*8C2=28 One quarter and any other 2 of the other 8 coins. \n" ); document.write( "3C2*5C1=3*5=15 Two dimes and one nickel. \n" ); document.write( "3C3=1 Three dimes \n" ); document.write( "28+16+1=44 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |