有点秀逗,帮忙看下这题吧 GWD-2-23

tracytrace · 发表于 2010-8-3 23:06:12

Q23:

AMOUNT OF BACTERIA PRESENT

Time	Amount
1:00 P.M.	10.0 grams
4:00 P.M.	x grams
7:00 P.M.	14.4 grams

Data for a certain biology experiment are given in the table above.If the amount of bacteria present increased by the same fraction during each of the two 3-hour periods shown, how many grams of bacteria were present at 4:00 P.M.?

A.12.0

B.12.1

C.12.2

D.12.3

E.12.4

我选了C.

200702061 · 发表于 2010-8-3 23:09:49

A么。。。。

说increased by the same fraction 题目中经历两个阶段从10到了14.4 中间的数就应该是12么……以1.2倍的速度增长

sayysong · 发表于 2010-8-3 23:10:32

应该是A吧
题目中的increased by the same fraction，实际上是percentage的另一种说法罢了。
这里在两段时间段内，都以20%的速度增长，得出4:00 P.M.的是12 grams

eflet222 · 发表于 2010-8-4 00:17:08

OG上有的,每一期都是按比例增长,是选a

有点秀逗,帮忙看下这题吧 GWD-2-23

所属分类: GMAT考试

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