Question
Farmer Perry has 4 geese. The mass of Goose N is the same as the average mass of the 4 geese. Goose P weighs 3 kg less than the average mass of the 4 geese. The mass of Goose Q is 7 kg more than the average mass of the 4 geese. The mass of Goose R is 6 kg. Find the total mass of the 4 geese.
3 m

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Farmer Perry has 4 geese. The mass of Goose N is the same as the average mass of the 4 geese. Goose P weighs 3 kg less than the average mass of the 4 geese. The mass of Goose Q is 7 kg more than the average mass of the 4 geese. The mass of Goose R is 6 kg. Find the total mass of the 4 geese.