Average Score
Algebra
Level
1
If Marvin had an average score of 82 on four tests, and if his three tests had an average score of 78, what score did Marvin receive on the fourth test?
The answer is 94.
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1 solution
The total marks scored in all 4 tests:
82 × 4 = 328
The total marks scored in the first 3 tests:
78 × 3 = 234
Hence, the number of marks Marvin scored at the 4th test:
3 2 8 − 2 3 4 = 9 4