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What is the mean of 9 , 12 z and 15 stamps
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What is the mean of 9 , 12 z and 15 stamps

User Tkiethanom
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Add all of them together and then divide the sum by the amount of numbers there was (3). Hope this helps
User Bkqc
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9+12+15=36 36/3=12 hope that helps
User MrNetherlands
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