document.write( "Question 206818This question is from textbook
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\n" ); document.write( "\n" ); document.write( "1. Without writing them down, what are the number of subsets of the set A = {a, b, c, d, e}? Of set B = {a, b, c, d, e, f, g, h, i}? \n" ); document.write( "

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1. Without writing them down, what are the number of subsets of the set A = {a, b, c, d, e}? Of set B = {a, b, c, d, e, f, g, h, i}?
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document.write( "When making a subset, there are two choices you must\r\n" );
document.write( "make for each element in A or B.  Those 2 choices are: \r\n" );
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document.write( "1.  Include it as an element in the subset you are making\r\n" );
document.write( "2.  Do NOT include it as an element in the subset you are making.\r\n" );
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document.write( "There are 2 choices for element a, 2 choices for element b, \r\n" );
document.write( "2 choices for element c, 2 choices for element d, and 2 choices for\r\n" );
document.write( "element e.\r\n" );
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document.write( "That's  or 32 subsets.  That counts the empty or null set\r\n" );
document.write( "because that's the case where we do not use any of them in the subset\r\n" );
document.write( "we are making. It also includes the entire set, because that's the \r\n" );
document.write( "case when we choose them all.\r\n" );
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document.write( "Use the same principle for the subsets of B.\r\n" );
document.write( "There are 9 elements in B, so the answer is  or 512 subsets.\r\n" );
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document.write( "Edwin

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