Question
Oliver has some green and pink beads. The total mass of all his beads is 210 g. He has 7 less green beads than pink beads. The average mass of the green beads is 4 g. The average mass of the pink beads is 10 g. How many beads does Oliver have altogether?
3 m

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Oliver has some green and pink beads. The total mass of all his beads is 210 g. He has 7 less green beads than pink beads. The average mass of the green beads is 4 g. The average mass of the pink beads is 10 g. How many beads does Oliver have altogether?