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12 January, 01:39

On Monday Mrs. Wise bought 3 lbs of apples at $4 per lb. On Tuesday, apples were on sale for 20% off so she bought another 5 lbs.

What was the average price for all apples Mrs. Wise bought?

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  1. 12 January, 01:54
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    Average price=total price/total weight, let p be the average price:

    p = (3*4+5*4 * (100-20) / 100) / 8

    p = (12+16) / 8

    p=$3.50/lb
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