document.write( "Question 1121053: In a group of students, 70 have a personal computers, 120 have a personal stereo and 41 have both. How many own at least one of these devices? Draw an appropriate Venn diagram. \n" ); document.write( "

Algebra.Com's Answer #736821 by AnlytcPhil(1806) $\"\"$ $\"About$

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I see that Ikleyn prefers the combinatorial sieve formula:\r\n" );
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document.write( "N(A or B) = N(A)+N(B)-N(A and B)\r\n" );
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document.write( "to the Venn diagram with two sets.\r\n" );
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document.write( "However, I'll bet she doesn't prefer the combinatorial sieve formula:\r\n" );
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document.write( "N(A or B or C) = N(A)+N(B)+N(C)-N(A and B)-N(A and C)-N(B and C)+N(A and B and C) \r\n" );
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document.write( "to the Venn diagram with three sets. \r\n" );
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document.write( "Right, Ikleyn? J\r\n" );
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document.write( "AnlytcPhil (aka Edwin McCravy)

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