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Mathematics, 23.07.2021 18:20 Saise9288
Mỗi phòng học có 6 bóng đèn. Xác suất để mỗi bóng đèn hỏng là 0,2. Gọi x là số bóng đèn sáng ( x = 0;1;2;..6 )
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Mỗi phòng học có 6 bóng đèn. Xác suất để mỗi bóng đèn hỏng là 0,2. Gọi x là số bóng đèn sáng ( x = 0...
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