Question
There are 70 pink balls and 31 silver balls in a basket. 310 of the pink balls are defective. All the silver balls are not defective. How many more pink balls than silver balls are not defective?
4 m

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There are 70 pink balls and 31 silver balls in a basket. 310 of the pink balls are defective. All the silver balls are not defective. How many more pink balls than silver balls are not defective?