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笔者曾经对随机抽取的20名小学六年级学生做过一个关于估算的调查,问卷中有这样一道选择题:“某校有900名男生,女生占全校人数的40%,女生有()人。A.1500B.600
The author has conducted a survey on the estimation of 20 randomly selected primary school students of grade 6 with the following multiple-choice questions: ”There are 900 boys in a school, girls make up 40% of the whole school population and girls have () .A.1500B.600