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Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are  dogs in the school.

  62 have blue ribbons, 55 have green ribbons, and 63 have white ribbons.

 31 have a blue ribbon and a green ribbon; 30 have a green ribbon and a white ribbon; 35 have a blue ribbon and a white ribbon.

16  have all three ribbons

 Jun 22, 2022
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I'm not sure what this question is asking for.

 Jun 22, 2022

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