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Question
There are 900 stones in a box. Among them, there are 243 red, 468 yellow, and a few blue stones. How many blue stones are there?
There are 900 stones in a box. Among them, there are 243 red, 468 yellow, and a few blue stones. How many blue stones are there?
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Solution
The correct option is B 189
Total number of stones = 900
Number of red stones = 243
Number of yellow and blue stones = 900−243=657
Number of yellow stones = 468
Number of blue stones = 657−468=189
Hence, there are 189 blue stones.
Total number of stones = 900
Number of red stones = 243
Number of yellow and blue stones = 900−243=657
Number of yellow stones = 468
Number of blue stones = 657−468=189
Hence, there are 189 blue stones.
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