求教数学题

hucongzi722 · 发表于 2011-2-16 11:38:08

During a sale at an office supply store, for every box of paper clips purchased for 15 cents, a second box can be purchased for 4 cents. How many boxes of paper clips did Paul buy if he spent 91 cents on boxes of papaer clips?
A.6 B.7 C.8. D.9 E.10

一生涯凡人也 · 发表于 2011-2-16 11:43:31

答案选D。很简单 4X（15+4）+15=91. 9个吧

sdcar2010 · 发表于 2011-2-16 11:45:25

15*5 +4*4

DDDDDDDDd

hucongzi722 · 发表于 2011-2-16 11:55:24

thank you!

what's the mean of "a second box "?

sdcar2010 · 发表于 2011-2-16 12:06:01

a second box = another box after the first box

求教数学题

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求教 数学题

所属分类: GMAT考试

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求教数学题