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13-05-2024
Mathematics

Answered

một thiết bị có 10 chi tiết. Xác suất để chi tiết làm việc tốt nhất là 0,95
A> có đúng 2 chi tiết làm việc tốt
B>. tính xs để đúng 2 chi tiết làm việc tốt
C> giả sử thiết bị đó có n chi tiết. Hỏi n bằng bao nhiêu xs có ít nhất 1 chi tiết lơn hơn 0.9

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