Posted by **Anonymous** on Wednesday, September 18, 2013 at 1:53pm.

Penny is a dentist. She took a survey of her patients to see which type of toothbrush they prefer. Her 50 male patients prefer electric toothbrushes to manual ones in a 3:2 ratio. Her 65 female patients prefer electric to manual in a 8:5 ratio. In all, her patients prefer electric toothbrushes to manual ones in what ratio?

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