Question
There are 55 grey balls and 30 purple balls in a basket. 411 of the grey balls are blemished. All the purple balls are not blemished. How many more grey balls than purple balls are not blemished?
4 m

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There are 55 grey balls and 30 purple balls in a basket. 411 of the grey balls are blemished. All the purple balls are not blemished. How many more grey balls than purple balls are not blemished?