Jack has an average of 80 on four exams. If he has one more exam
MATHEMATICS
SAT 2021
Jack has an average of 80 on four exams. If he has one more exam and he wants to bump his average up by 2 points, what must he score to get that average he wants?
- A. 90
- B. 85
- C. 87
- D. 88
Correct Answer: D. 88
Explanation
First, we need to find the total number of points for his fourth exam. That would be 80?4 or 320. The reason we do this is because we can calculate his point total with the new average and determine his final score by taking the difference. So 82?5=410. We subtract 410 and 320 to get 90 as our answer.
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