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15-01-2020
Mathematics

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A bag contains 120 marbles. Some are red and the rest are black. There are 9 marbles for every black marble. How many red marbles are in the bag?

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15-01-2020

Answer:

There are 12 red marbles

9 black marbles = 108

9 black for 1 red= 12 red

108 black+ 12 red= 120

Step-by-step explanation:

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