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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?

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?

User Alexnavratil
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8.1k points

1 Answer

4 votes
She owned 7 blue pens
21:7
She has 28 pens
User Alphaleonis
by
8.3k points
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