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2 years ago

13

In a bag, the ratio of red to blue counters is 3:4.

1 answer:

Elza [17]2 years ago

7 0

R/b = 2/3, so r = 2/3 b
(r-3)/b = 3/5
5(r-3) = 3b
5(2/3 b - 3) = 3b
Just solve for b

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