A bag contains 144 marbles. Some are red and the rest are black.There are 11 red marbles for every black marble.How many red mar
bles are in the bag?
1 answer:
Answer:
There are 132 red marbles and 12 black marbles
Work:
I made a ratio of 11:1 and multiplied both sides by 12 which gave me 132:12
132+12=144
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