Mathematics
Mathematics, 26.02.2021 14:00, andrewjewell2005

Uma caixa contém 1 bola vermelha e 3 azuis. Tiram-se, simultaneamente ,ao acaso, duas bolas da caixa. A probabilidade de sairem duas bolas vermelhas é?

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Uma caixa contém 1 bola vermelha e 3 azuis. Tiram-se, simultaneamente ,ao acaso, duas bolas da caixa...

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