2016 AMC 8 Problems/Problem 3
Problem
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?
Solutions
Solution 1
We can call the remaining score . We also know that the average, 70, is equal to
. We can use basic algebra to solve for
:
giving us the answer of
.
Solution 2
Since is
more than
and
is
more than
, for
to be the average, the other number must be
less than
, or
.
Video Solution
https://www.youtube.com/watch?v=LqnQQcUVJmA (has questions 1-5)
2016 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 2 |
Followed by Problem 4 | |
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