2016 AMC 8 Problems/Problem 3: Difference between revisions
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Solution (Dhman2727): | |||
We see that <math>80-70=10</math> and <math>90-70=20</math>. We then find that <math>10+20=30</math>. We want our average to be <math>70</math>, so we find <math>70-30=40</math>. So our final answer is <math>\textbf{(A) }40</math>. | |||
Revision as of 08:42, 23 November 2016
3. 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
This problem needs a solution. If you have a solution for it, please help us out by adding it.
Solution (Dhman2727):
We see that 
and 
. We then find that 
. We want our average to be , so we find 
. So our final answer is 
.
