document.write( "Question 1149049: An English reading list has 10 American novels and 7 English novels. A student must read 4 from the list, and at least 2 must be American novels. In how many different ways can the 4 books be selected?
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Algebra.Com's Answer #770406 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "4, 3, or 2 of the 4 must be American novels. \n" ); document.write( "(1) 4 American: choose 4 of the 10 American AND 0 of the 7 English. \n" ); document.write( " \n" ); document.write( "OR \n" ); document.write( "(2) 3 American, 1 English: choose 3 of the 10 American AND 1 of the 7 English. \n" ); document.write( " \n" ); document.write( "OR \n" ); document.write( "(3) 2 American, 2 English: choose 2 of the 10 American AND 2 of the 7 English. \n" ); document.write( " \n" ); document.write( "ANSWER: \n" ); document.write( " \n" ); document.write( "Use a calculator if necessary. \n" ); document.write( "If you want practice calculating these kinds of numbers, perform the similar calculations to find the numbers of ways of choosing either 1 or 0 American novels; then verify that the sum of all the numbers you have calculated is equal to C(17,4), the total number of ways of selecting 4 of the 17 novels. \n" ); document.write( " \n" ); document.write( " |