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Students were asked to choose their favorite subject and, and 3/5 choose either history or biology. If 1/5 of the students choose history, what fraction choose biology?
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Students were asked to choose their favorite subject and, and 3/5 choose either history or biology. If 1/5 of the students choose history, what fraction choose biology?

Students were asked to choose their favorite subject and, and 3/5 choose either history-example-1
User John Babb
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2/5

3/5 chose either history or biology, and 1/5 chose history. If we want to find what fraction chose biology, we just subtract those who chose history for those who chose either one. 3/5 minus 1/5 is 2/5.
User Yalamber
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