Question
John has some pink and brown balls. The total mass of all his balls is 201 g. He has 10 less pink balls than brown balls. The average mass of the pink balls is 3 g. The average mass of the brown balls is 8 g. How many balls does John have altogether?
3 m

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John has some pink and brown balls. The total mass of all his balls is 201 g. He has 10 less pink balls than brown balls. The average mass of the pink balls is 3 g. The average mass of the brown balls is 8 g. How many balls does John have altogether?