If 55 percent of a group of people have brown hair and 80 percent of the same group do not have red hair, what fraction

Source: Magoosh

If 55 percent of a group of people have brown hair and 80 percent of the same group do not have red hair, what fraction of those who do not have brown hair have red hair?

A. 1/4
B. 4/11
C. 4/9
D. 5/9
E. 4/5

The OA is C

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