document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199241>Question 1199241</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a concert results in $11,200 in revenue from selling 400 tickets. a regular ticket costs $30, and the student discounted ticket costs $25. how many people purchased tickets at the regular price? </SPAN>\n" );
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document.write( "Here is an informal solution method, using logical reasoning and mental arithmetic instead of formal algebra.<br><BR>\n" );
document.write( "If all 400 tickets had been student discounted tickets, the total revenue would have been 400($25) = $10,000.<BR>\n" );
document.write( "The actual total revenue was $11,200, which is $1200 more.<BR>\n" );
document.write( "The difference in cost between the two kinds of tickets is $5; the number of regular price tickets needed to make up the additional $1200 is 1200/5 = 240.<br><BR>\n" );
document.write( "ANSWER: 240 people purchased regular tickets.<br><BR>\n" );
document.write( "CHECK: 240(30)+160(25) = 7200+4000 = 11200<br><BR>\n" );
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