Question
Bobby has some white and green balls. The total mass of all his balls is 250 g. He has 5 less white balls than green balls. The average mass of the white balls is 6 g. The average mass of the green balls is 8 g. How many balls does Bobby have altogether?
3 m

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Bobby has some white and green balls. The total mass of all his balls is 250 g. He has 5 less white balls than green balls. The average mass of the white balls is 6 g. The average mass of the green balls is 8 g. How many balls does Bobby have altogether?