Each marble bag sold by Rachel's Marble Company contains 3 purple marbles for every 2 green marbles. If a bag has 21 purple marbles, how many green marbles does it contain?

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12-12-2016
Mathematics

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Each marble bag sold by Rachel's Marble Company contains 3 purple marbles for every 2 green marbles. If a bag has 21 purple marbles, how many green marbles does it contain?

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bcalle bcalle · Answer 1 · 2016-12-12T19:06:37+01:00

bcalle bcalle

12-12-2016

The ratio is 3:2, purple :green
The bag has 21 purple so to get from 3 to 21 it is multiplied by 7; so we must also multiply the 2 by 7 to keep the ratio balanced.
21:14

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