average of 2 1/2+ 4 2/3+ 6 3/4
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Average
= 2 1/2 + 4 2/3 + 6 3/4 ÷ 3
= 5/2 + 14/3 + 27/4 ÷ 3
= 167/12 ÷ 3
= 167/36
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