单选题
In a certain population, 40 percent of all people have biological characteristic X; the others do not. If 8,000 people have characteristic X, how many people do not have X?
A、
3200
B、
4800
C、
12,000
D、
16,000
E、
(E) 20,000
【正确答案】
C
【答案解析】
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