baongoc4545 baongoc4545
  • 16-03-2024
  • Mathematics
contestada

Bắn 2 phát đạn vào 1 máy bay với xác suất trúng tương ứng là 0,4 và 0,7. Nếu trúng 1 phát thì xác suất rơi máy bay là 0,2 nếu trúng 2 phát thì xác suất rơi máy bay là 0,6. Tìm xác suất máy bay rơi

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