A student's average score for 4 tests is 82. What score must the student get on a 5th test to raise the average to 84?
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Worked Solution
Step 1: Sum of 4 tests = 4 × 82 = 328.
Step 2: Required sum for 5 tests at average 84 = 5 × 84 = 420.
Step 3: 5th test score = 420 − 328 = 92.
Answer: 92
Correct answer: 92
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