The average score of 5 tests is 73. The first 4 scores are 71, 61, 80, 54. What is the last score?
Answer and explanation
Correct answer: B. 99
- Step 1: Total of all scores .
- Step 2: Last score .
Answer
99.
Why not the others: 73: it assumes the last score equals the average. 66: it uses the mean of the known scores.
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