# A teacher had 21 red pens. if the ratio of red pens to blue pens she owned was 3:1 how many pens did she have total?

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28 because…. 21/7= 3 7x1=7 so 21+7=28

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(2) Answers

28 because…. 21/7= 3 7x1=7 so 21+7=28

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