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What fraction of this year's graduating students at a certain college are males?
(1) Of this year's graduating students, 33 percent of the males and 20 percent of the females transferred from another college.
(2) Of this year's graduating students, 25 percent transferred from another college.
ANS: C
請問這一題怎麼解呢? 我是用0.33M+0.2F=0.25(M+F). 可是解不出來所以就選了E. 請教教我! 謝謝.