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Question
A boy scored the following marks in various class tests during a term, each test being marked out of 20.
15, 17, 16, 7, 10, 12, 14, 16, 19, 12, 16
What is his mean marks?
Sum
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Solution
Total marks scored by the boy in 11 tests
= 15 + 17 + 16 + 7 + 10 + 12 + 14 + 16 + 19 + 12 + 16
= 154
∴ Mean marks
= `(154)/(11)`
= 14.
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Properties of Mean
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