Question
Archie has some grey and blue beads. The total mass of all his beads is 210 g. He has 3 less grey beads than blue beads. The average mass of the grey beads is 5 g. The average mass of the blue beads is 10 g. How many beads does Archie have altogether?
3 m

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Archie has some grey and blue beads. The total mass of all his beads is 210 g. He has 3 less grey beads than blue beads. The average mass of the grey beads is 5 g. The average mass of the blue beads is 10 g. How many beads does Archie have altogether?