Question
There are 66 black balls and 34 brown balls in a basket. 311 of the black balls are blemished. All the brown balls are not blemished. How many more black balls than brown balls are not blemished?
4 m

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There are 66 black balls and 34 brown balls in a basket. 311 of the black balls are blemished. All the brown balls are not blemished. How many more black balls than brown balls are not blemished?