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请问这道数学题怎么做?

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170108xuf

发表于2019-10-29
Of the total number of students enrolled at University U in the fall of 2008, 3/8 were sophomores and 1/50 were biology majors. Which of the following could be the total number of students enrolled at University U in the fall of 2008? Indicate all such numbers. A. 7,000 B. 7,040 C. 7,050 D. 7,100 E. 7,125 F. 7,200

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255952lqtkq

2019-10-29

答案 AF 总人数的 3/8 是整数,总人数的 1/50 也是整数,所以总人数必须是 8 和 50 的公倍数,8 和 50 的最小公倍数是 200,所以选择 200 的倍数就好,7000 和 7200 符合。