Another way to think about this is in terms of weighted average, say, hour X number of boxes.
First set: 1*3
Second set: 2*2
Third set: 1*5
Average rate = Sum of sets/Total hours = (3+4+5)/4 = 3
For this simple problem, this method of thinking may be onerous. But it may prove to be useful when considering a long series.
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First set: 1*3
Second set: 2*2
Third set: 1*5
Average rate = Sum of sets/Total hours = (3+4+5)/4 = 3
For this simple problem, this method of thinking may be onerous. But it may prove to be useful when considering a long series.
Posted from my mobile device
