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A jar contains 7 blue marbles, 12 red marbles, and 4 green marbles. What is the ratio of red marbles to the total number of marbles in the jar?

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briyonce

add all the numbers together and the divide by 12. 

Christinecoconnor


Add all the marbles to find the total number in the jar, which is 7+12+4, which is 23. There are 12 red marbles so the ratio is 12/23 or 12:23.

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