At a certain college there are twice as many English majors as history majors and three times as many English majors as mathematics majors. What is the ratio of the number of history majors to the number of mathematics majors?
6 to 1
3 to 2
2 to 3
1 to 5
1 to 6
在表达倍数的时候,先说的那个放在等号的左边,后说的放在等号的右边,倍数加减,都发生在等号的右边
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