Average lesson g) question
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21+17/2
38/2
19
the answer is above mark as brainliest
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Average of first 8 number = 21
Average of last 4 number = 18
If average of all 12 numbers is 18, then we have 8 x 3 = 24 extra from first eight numbers.
This extra is distributed over all 12 numbers increasing their average by 24/12 = 2.
=> Final average = 18 + 2 = 20
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