请教PREP数学题

BERYL1986 · 发表于 2010-1-3 22:51:20

At a certain supplier, a machine of type A costs 2000 and a machine of type B costs 50000. Each machine can be purchased by making a 20 percent down payment and repaying the remainder of the cost and the financial charges over a period of time. If the financial charges are equal to 40% of the remainder of the cost, how much less would 2 machines of type A cost than 1 machine of type B under this arrangement.
A10000 B11200 C12000 D12800 E13200
Answer:E
我的计算方法是：2 machines of type A 40000*0.8*1.4
1 machine of type B 50000*0.8*1.4
差额为10000*0.8*1.4= 11200

caixinni · 发表于 2010-1-3 23:08:06

楼主忘记把首付的20%算进去咯～首付的差值是3000 加上楼主算出的分期付款的差额刚好是答案中的13200

dreambuilder · 发表于 2010-1-4 02:01:56

LZ是不是吧MACHINE A 的价格打错了？

请教PREP数学题

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