Question
Vincent has some silver and brown balls. The total mass of all his balls is 250 g. He has 4 more brown balls than silver balls. The average mass of the silver balls is 9 g. The average mass of the brown balls is 17 g. How many balls does Vincent have altogether?
3 m

Click button first when a symbol is required. X

Vincent has some silver and brown balls. The total mass of all his balls is 250 g. He has 4 more brown balls than silver balls. The average mass of the silver balls is 9 g. The average mass of the brown balls is 17 g. How many balls does Vincent have altogether?