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A bag contains the following marbles: 8 black marbles, 12 blue marbles, 18 brown marbles, and 6 green marbles. What is the ratio of brown marbles to blue marbles? Express your ratio as a fraction or with a colon.

User ATT
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The ratio of brown marbles to blue marbles is 3:2.

We can take note of what we know:

• There are 18 brown marbles
• There are 12 blue marbles
• There are 36 total marbles

Let’s plug the ratio of brown:blue marbles in:

18:12

Dividing both numbers by 6 will result in 3:2.

Therefore, the ratio of brown to blue marbles is 3:2 with there being more brown marbles present.
User Latiesha
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