请NN们帮助，有一道PREP数学没看懂

xbabylon · 发表于 2011-5-1 21:34:28

明白的同学可以帮助翻译一下吗？完全不知道怎么做。
A computer chip manufactor expects the ratio of the number of defective to the total number of chips in all future shipments to equal the corresponding tatio for shipments S1,S2,S3 and S4, combined, as shown in the table above. What is the except number of defective in a shipment of 60,000 chips?

底下还附了一个大表。
谢谢！

sdcar2010 · 发表于 2011-5-1 21:36:12

expects ... defective

sdcar2010 · 发表于 2011-5-1 21:40:05

Table:
category Defective # Total #
S1 D1 T1
S2 D2 T2
S3 D3 T3
S4 D4 T4

defective ratio = (D1 +D2 +D3 + D4)/(T1 + T2 + T3 + T4)

Answer = 6000*(defective ratio)

xbabylon · 发表于 2011-5-1 21:41:37

看了做法大致明白题目说的什么了。

请NN们帮助，有一道PREP数学没看懂

大致明白了，谢谢！

所属分类: GMAT考试

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