An anthropologist studying food gathering practices in three remote communities records daily caloric intake per person: Community X averages 2,100 kcal, Community Y averages 3,400 kcal, and Community Z averages 2,800 kcal. If she surveys 12 people from X, 8 from Y, and 10 from Z, what is the weighted average daily caloric intake across all 30 individuals? - Portal da Acústica