Difference between revisions of "2017 AMC 12A Problems/Problem 3"
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==Solution== | ==Solution== | ||
| − | Taking the contrapositive of the statement | + | Taking the contrapositive of the statement "if he got all of them right, he got an A" yields "if he didn't get an A, he didn't get all of them right", yielding the answer B. |
==See Also== | ==See Also== | ||
{{AMC12 box|year=2017|ab=A|num-b=2|num-a=4}} | {{AMC12 box|year=2017|ab=A|num-b=2|num-a=4}} | ||
Revision as of 16:02, 8 February 2017
Problem
Ms. Carroll promised that anyone who got all the multiple choice questions right on the upcoming exam would receive an A on the exam. Which on of these statements necessarily follows logically?
Solution
Taking the contrapositive of the statement "if he got all of them right, he got an A" yields "if he didn't get an A, he didn't get all of them right", yielding the answer B.
See Also
| 2017 AMC 12A (Problems • Answer Key • Resources) | |
| Preceded by Problem 2 |
Followed by Problem 4 |
| 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 12 Problems and Solutions | |
