Read the following table carefully and answer the questions given below it.
Sales of Aviator sun-glasses by six stores M, N, O, P, Q, and R during 5 years
Total number of sun glasses sold by Store R in the given years
= 852 + 780 + 820 + 645 + 855 = 3952
=> Required average = 3952/5 = 790.4
= 790 (approx.)
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