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Mathematics, 19.03.2021 19:50 sloansters9315

Na turma de Jaqueline, um terço dos alunos são meninas e dessas, dois quintos já fizeram aniversário esse ano. Supondo que na turma de Jaqueline há 30 alunos
e que todas as meninas fazem festa de aniversário, quantas festas ainda haverá
esse ano?​

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