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What is the average number of 40 12s, 30 11s and 25 9.5s?

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What is the average number of 40 12s, 30 11s and 25 9.5s?
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3 Answers

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Average is the sum of your data points divided by the total number of such data points.
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Don't simply post the question. What have you tried and what part of the problem confuses you?
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40 12s have a sum of 40 * 12 ...

40 + 30 + 25 = 95 numbers
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