The table above shows the average(arithmetic mean) price per dozen eggs sold in a certain store during three successive months. If 2/3 as many dozen were sold in April as in May,and twice as many were sold in June as in April, what was the average price per dozen of the eggs sold over the three-month period?
$1.08
$1.10
$1.14
$1.16
$1.18
本题没啥难度,只要注意倍数表达,别弄反了方向
设X, Y, Z表示April, May, June
2/3 as many dozen were sold in April as in May → X=2Y/3
twice as many were sold in June as in April → 2X=Z
可得X : Y : Z = 2 : 3 : 4
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