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Mathematics, 13.03.2020 22:47 Tyrant4life

Numa universidade são lidos apenas dois jornais X e Y, 80% dos alunos lêem o jornal X e 60% o jornal Y. Sabendo-se que todo aluno é leitor de pelo menos um dos dois jornais. Qual é o porcentual de alunos que lêem ambos

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