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Add all the measurements together than divide by the total number of measurements you added. For example, to average 5kg, 7kg, and 9kg, we add 5, 7 and 9 then divide by 3 (because you are adding three numbers together) to find the average of 7.
For a set of measurements, the mean valueis the sum of all the measurement values divided by the number of measurements in the set.
Given the average,find the missing numbr in a set by following these steps: 1.Multiply the average by the number of items in the set. 2.Add the given numbers ni the set. 3.Find the difference of the product in step 1 and step2.
3.2 cm
11x14