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angelaramirez121
angelaramirez121 angelaramirez121
  • 22-02-2016
  • Mathematics
Answered

a teacher has 21 red pens if the ratio of red pens to blue pens she owned was 3:1 how many pens did she have in total

Verified Answer :

catharina903
catharina903 catharina903
  • 22-02-2016

The teacher had 21 red pens and ? Blue pens.
The ratio is 3:1
Divide 21 ÷ 3
21 ÷ 3 =7
Now multiply 1 × 7
Add 21 + 7
Your answer is 28 pens in total.

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