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Welp! Tysm!!!! Each marble bag sold by Justin's Marble Company contains 4 purple marbles for every 5 red marbles. If a bag has 20 purple marbles, how many red marbles does it contain?
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5 votes
Welp! Tysm!!!!

Each marble bag sold by Justin's Marble Company contains 4 purple marbles for every 5 red marbles. If a bag has 20 purple marbles, how many red marbles does it contain?

User Kevinarpe
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1 Answer

5 votes
4:5 = 20:x

Since 20/4 is 5, we know the ratio was multiplied by 5 so the bag contains 25 red marbles.
User Almighty
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