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Mathematics, 02.12.2020 03:10 SmolBeanPotato

A aspereza nas bordas de produtos de papel cortado aumenta a medida que as laminas de uma faca vão sendo gastas. Somente 1% dos produtos cortados com novas lâminas tem bordas ásperas, 3% dos produtos cortados com lâminas medianamente afiadas exibem rugosidade e 5% dos produtos cortados com lâminas gastas exibem rugosidade. Se 25% das lâminas na fabricação de papel forem novas, 60% forem mediamente afiadas e 15% forem gastas, qual será a proporção dos produtos que exibem uma aspereza nas bordas? Resposta

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