Find the average of 6 whole 2/5 , 5 whole 3/4 , 4whole 1/5 , 7 whole 7/10
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6 whole 2/5+5 whole3/4+ 4 whole 1/5+7 whole 7/10
=32/5+23/4+21/5+77/10
=(256+230+168+308)/40
=1/2*952/40
=119/10
=11.9(ans)
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