Mathematics, 19.03.2021 15:40 Blakemiller2020

Uma urna tem 30 bolas, sendo 10 vermelhas e 20 azuis. Se sortearmos 2 bolas, 1 de cada vez e repondo a sorteada na urna, qual será a probabilidade de as duas bolas serem vermelhas? (respostas apenas o número em fração irredutível, decimal com 4 casas ou porcentagem com 2 casas decimais)

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Uma urna tem 30 bolas, sendo 10 vermelhas e 20 azuis. Se sortearmos 2 bolas, 1 de cada vez e repondo...

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