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A teacher had 21 red pens. If the ratio of red pens to blue pens she owned 3:1, how many pens did she have total?
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A teacher had 21 red pens. If the ratio of red pens to blue pens she owned 3:1, how many pens did she have total?
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Sep 22, 2017
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A teacher had 21 red pens. If the ratio of red pens to blue pens she owned 3:1, how many pens did she have total?
Mathematics
middle-school
Alexnavratil
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She owned 7 blue pens
21:7
She has 28 pens
Alphaleonis
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Sep 26, 2017
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Alphaleonis
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