题目

A manufacturer makes and sells 2 products, P and Q. The revenue from the sale of each unit of P is $20.00 and the revenue from the sale of each unit of Q is $17.00. Last year the manufacturer sold twice as many units of Q as P. What was the manufacturer’s average (arithmetic mean) revenue per unit sold of these 2 products last year?

选项

A.

$28.50

B.

$27.00

C.

$19.00

D.

$18.50

E.

$18.00

解析

我们代入一些符合已知条件的**简单数值**来解题…… 去年制造商销售Q的数量是P的两倍。 所以,假设制造商卖出了1个P和2个Q。 去年这两款产品的单位平均(算术平均)收入是多少? 总收入 = 1×(20.00美元) + 2×(17.00美元) = 20.00美元 + 34.00美元 = 54美元 共卖出了3个单位。 因此,平均单价 = 54美元÷3 = 18美元 答案:E
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