tranthanhhong354 tranthanhhong354
  • 20-11-2022
  • Mathematics
contestada

Một xạ thủ bắn liên tục 4 phát đạn vào bia. Gọi Ak là các biến cố " xạ thủ bắn trúng lần thứ k" với k = 1,2,3,4. Hãy biểu diễn các biến cố sau qua các biến cố A1, A2, A3, A4

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