Difference between revisions of "2016 AMC 8 Problems/Problem 3"
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− | + | Four students take an exam. Three of their scores are <math>70, 80,</math> and <math>90</math>. If the average of their four scores is <math>70</math>, then what is the remaining score? | |
<math>\textbf{(A) }40\qquad\textbf{(B) }50\qquad\textbf{(C) }55\qquad\textbf{(D) }60\qquad \textbf{(E) }70</math> | <math>\textbf{(A) }40\qquad\textbf{(B) }50\qquad\textbf{(C) }55\qquad\textbf{(D) }60\qquad \textbf{(E) }70</math> |
Revision as of 10:03, 23 November 2016
Four students take an exam. Three of their scores are and . If the average of their four scores is , then what is the remaining score?
Solution
We see that and . We then find that . We want our average to be , so we find . So our final answer is .
2016 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 2 |
Followed by Problem 4 | |
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All AJHSME/AMC 8 Problems and Solutions |
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