Difference between revisions of "2017 AMC 8 Problems/Problem 14"
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Assume the total amount of problems is 200, since we are dealing with percentages, and no values. Then, we know that Chloe got 80 problems correct by herself, and that Chloe got 176 problems right in total. The problems she got right working together, is <math>176-100</math> since she did 100 problems by herself. The problems she got right working together, Zoe also got right. | Assume the total amount of problems is 200, since we are dealing with percentages, and no values. Then, we know that Chloe got 80 problems correct by herself, and that Chloe got 176 problems right in total. The problems she got right working together, is <math>176-100</math> since she did 100 problems by herself. The problems she got right working together, Zoe also got right. | ||
+ | [NOT FINISHED] | ||
==See Also== | ==See Also== |
Revision as of 02:13, 30 December 2017
Contents
[hide]Problem 14
Chloe and Zoe are both students in Ms. Demeanor's math class. Last night they each solved half of the problems in their homework assignment alone and then solved the other half together. Chloe had correct answers to only of the problems she solved alone, but overall of her answers were correct. Zoe had correct answers to of the problems she solved alone. What was Zoe's overall percentage of correct answers?
Solution
Let the number of questions that they solved alone be . Let the percentage of problems they correctly solve together be %. As given, .
Hence, .
Zoe got problems right out of . Therefore, Zoe got percent of the problems correct.
Solution 2
Assume the total amount of problems is 200, since we are dealing with percentages, and no values. Then, we know that Chloe got 80 problems correct by herself, and that Chloe got 176 problems right in total. The problems she got right working together, is since she did 100 problems by herself. The problems she got right working together, Zoe also got right. [NOT FINISHED]
See Also
2017 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 13 |
Followed by Problem 15 | |
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 AJHSME/AMC 8 Problems and Solutions |
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