Difference between revisions of "2007 AMC 10B Problems/Problem 6"
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Revision as of 11:19, 4 July 2013
Problem
The 
will be scored by awarding 
points for each correct response, 
points for each incorrect response, and 
points for each problem left unanswered. After looking over the 
problems, Sarah has decided to attempt the first 
and leave only the last 
unanswered. How many of the first problems must she solve correctly in order to score at least 
points?
Solution
Sarah is leaving questions unanswered, guaranteeing her 
points. She will either get points or points for the rest of the questions. Let 
be the number of questions Sarah answers correctly.
The number of questions she answers correctly has to be a whole number, so round up to get 
See Also
| 2007 AMC 10B (Problems • Answer Key • Resources) | ||
| Preceded by Problem 5 |
Followed by Problem 7 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
