document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190227>Question 1190227</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a survey of local residents, 1/5 were left-handed and <BR>\n" );
document.write( "1/12 were ambidextrous. The rest were right-handed.<BR>\n" );
document.write( "What is the ratio of right-handed people to everyone else?<BR>\n" );
document.write( "A) 29/37<BR>\n" );
document.write( "B) 34/47<BR>\n" );
document.write( "C) 39/65<BR>\n" );
document.write( "D) 43/17<BR>\n" );
document.write( "E) 40/19 </SPAN>\n" );
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document.write( "Answer: <font color=red>D) 43/17</font>\r<BR>\n" );
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document.write( "Reasoning:\r<BR>\n" );
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document.write( "The denominators are 5 and 12, which multiply to 5*12 = 60. This is a common denominator. I'll pick this number as the total number being surveyed.\r<BR>\n" );
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document.write( "If we had 60 residents, then,<BR>\n" );
document.write( "1/5 * 60 = 12 are left-handed<BR>\n" );
document.write( "1/12 * 60 = 5 are ambidextrous<BR>\n" );
document.write( "That leaves<BR>\n" );
document.write( "60-12-5 = 43 are right-handed\r<BR>\n" );
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document.write( "43 people are right-handed, and 60-43 = 17 are not right-handed (or note that 12+5 = 17)\r<BR>\n" );
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document.write( "The ratio of right-handers vs everyone else is <font color=red>43/17</font><BR>\n" );
document.write( "We can write that as 43:17 which is practically identical notation and means the same exact thing.<BR>\n" );
document.write( "The ratio cannot be reduced further because 43 and 17 have no factors in common other than 1.<BR>\n" );
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