OG 12 -221 请指教！

ccx · 发表于 2010-7-11 09:49:53

of the 200 students at college T majoring in one or more of the science, 130 are majoring in chemistry and 150 are majoring in biolojy. if at least 30 0f the students are not majoring in either chemistry or biolojy, then the number of the students majoring in both chemistry and biolojy could be any number from
A 20 to 50
B 40 to 70
C 50 to 130
D 110 to130
E 110 to 150

cassiel · 发表于 2010-7-11 10:41:02

of the 200 students at college T majoring in one or more of the science, 130 are majoring in chemistry and 150 are majoring in biolojy. if at least 30 0f the students are not majoring in either chemistry or biolojy, then the number of the students majoring in both chemistry and biolojy could be any number from
A 20 to 50
B 40 to 70
C 50 to 130
D 110 to130
E 110 to 150

-- by 会员 ccx (2010/7/11 9:49:53)

280-（200-30）=110
E表示 majoring science & majoring chemistry &both major science and chemist 的人数（130）小于 both major science and chemist（150）所以错了答案选D

OG 12 -221 请指教！

所属分类: GMAT考试

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