Question
Oscar has some grey and yellow beads. The total mass of all his beads is 234 g. He has 10 more yellow beads than grey beads. The average mass of the grey beads is 7 g. The average mass of the yellow beads is 9 g. How many beads does Oscar have altogether?
3 m

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Oscar has some grey and yellow beads. The total mass of all his beads is 234 g. He has 10 more yellow beads than grey beads. The average mass of the grey beads is 7 g. The average mass of the yellow beads is 9 g. How many beads does Oscar have altogether?