Wei Lin scored 78, 84 and 90 marks in three Mathematics tests. What is his average score?
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Worked Solution
Step 1: Average = total of all values ÷ number of values.
Step 2: Total = 78 + 84 + 90 = 252.
Step 3: Number of tests = 3.
Step 4: Average = 252 ÷ 3 = 84.
Answer: 84
Correct answer: 84
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