Aishah scored 18, 22, 19, 25 and 16 marks in five weekly spelling tests at her Tampines primary school. Find her average mark across the five tests.
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Worked Solution
Step 1: Add the five scores to get the total.
18 + 22 + 19 + 25 + 16 = 100.
Step 2: Divide the total by the number of data values (5 tests).
100 ÷ 5 = 20.
Final answer: average = 20 marks.
Answer: 20
Correct answer: 20
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