Difference between revisions of "2010 AMC 10B Problems/Problem 12"
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| − | The minimum possible value occurs when <math>20% </math> of the students who originally answered "No." answer "Yes." In this case, <math>x=20</math> | + | The minimum possible value occurs when <math>20%</math> of the students who originally answered "No." answer "Yes." In this case, <math>x=20</math> |
The maximum possible value occurs when <math>30%</math> of the students who originally answered "Yes." answer "No." and the <math>50%</math> of the students who originally answered "No." answer "Yes." In this case, <math>x=50+30=80</math> | The maximum possible value occurs when <math>30%</math> of the students who originally answered "Yes." answer "No." and the <math>50%</math> of the students who originally answered "No." answer "Yes." In this case, <math>x=50+30=80</math> | ||
Subtract <math>80-20</math> to obtain an answer of <math>\boxed{\mathrm{(D)} 60}</math> | Subtract <math>80-20</math> to obtain an answer of <math>\boxed{\mathrm{(D)} 60}</math> | ||
Revision as of 15:04, 24 January 2011
The minimum possible value occurs when $20%$ (Error compiling LaTeX. Unknown error_msg) of the students who originally answered "No." answer "Yes." In this case, 
The maximum possible value occurs when $30%$ (Error compiling LaTeX. Unknown error_msg) of the students who originally answered "Yes." answer "No." and the $50%$ (Error compiling LaTeX. Unknown error_msg) of the students who originally answered "No." answer "Yes." In this case, 
Subtract 
to obtain an answer of 
