Question
Farmer Sam has 4 geese. The mass of Goose C is the same as the average mass of the 4 geese. Goose D weighs 5 kg less than the average mass of the 4 geese. The mass of Goose E is 10 kg more than the average mass of the 4 geese. The mass of Goose F is 11 kg. Find the total mass of the 4 geese.
3 m

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Farmer Sam has 4 geese. The mass of Goose C is the same as the average mass of the 4 geese. Goose D weighs 5 kg less than the average mass of the 4 geese. The mass of Goose E is 10 kg more than the average mass of the 4 geese. The mass of Goose F is 11 kg. Find the total mass of the 4 geese.