What is the average of 12.5, 18.4, 15.5, 16.6, and 20.4?
average =Â $$\frac{sum\ of\ data}{number\ of\ data}$$
= $$\frac{12.5+18.4+15.5+16.6+20.4}{5}$$
= $$\frac{83.4}{5}$$
=Â 16.68
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