Difference between revisions of "2010 AMC 10B Problems/Problem 12"
(Created page with 'The minimum possible value occurs when 20% of the students who originally answered "No." answer "Yes." In this case, x=20 ---- The maximum possible value occurs when 30% of the s…') |
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The minimum possible value occurs when 20% of the students who originally answered "No." answer "Yes." In this case, x=20 | The minimum possible value occurs when 20% of the students who originally answered "No." answer "Yes." In this case, x=20 | ||
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The maximum possible value occurs when 30% of the students who originally answered "Yes." answer "No." and the 50% of the students who originally answered "No." answer "Yes." In this case, x=50+30=80 | The maximum possible value occurs when 30% of the students who originally answered "Yes." answer "No." and the 50% of the students who originally answered "No." answer "Yes." In this case, x=50+30=80 | ||
| − | Subtract 20 from 80 to obtain an answer of <math>\boxed | + | Subtract 20 from 80 to obtain an answer of <math>\boxed{\mathrm {(D)} 60}</math> |
Revision as of 14:00, 24 January 2011
The minimum possible value occurs when 20% of the students who originally answered "No." answer "Yes." In this case, x=20
The maximum possible value occurs when 30% of the students who originally answered "Yes." answer "No." and the 50% of the students who originally answered "No." answer "Yes." In this case, x=50+30=80
Subtract 20 from 80 to obtain an answer of 
