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Question: Ziyanda bought hair bands for her salon. The ratio of the number of black hair bands to brown hair bands to red hair bands is 7 : 2 : 1. What fraction of the total number of hair bands are brown?
The total ratio representing the hair bands is 7 (for the black ones) + 2 (for the brown ones) + 1 (for the red ones) = 10. Therefore, the fraction of the total number of hair bands that are brown is the ratio of brown ones to the total, which is 2/10 or simplified to 1/5.
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