thutra1892ko2 thutra1892ko2

05-05-2024
Mathematics

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Câu 1. Xác suất một bóng đèn Led của hãng A bị hỏng sau 2 năm sử dụng là 20%. Tính xác suất sao cho trong 5 bóng đèn Led của hãng A sau 2 năm sử dụng có 3 bóng bị hỏng.

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