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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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