jlia jlia
  • 20-10-2014
  • 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 total?



Answer :

danlsnvkj danlsnvkj
  • 20-10-2014
21/3 is 7 so there are 7 pens for every 1 ratio
7 x 1 = 7
21+7 = 28
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