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The mean is the average of several numbers. For example if you had a group of people with different ages of 11,14, 18, 19 the mean would be the total age, divided by the number of people

06 July 2011

So (11+14+18+19)/ 4 = 62/4 = 15.5 - the mean age is 15.5 years old

06 July 2011

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