diepanhnguyen5599 diepanhnguyen5599
  • 14-06-2021
  • Mathematics
contestada

Một hộp đựng 10 phong bì bốc thư trúng thưởng trong đó 3 phong bì đựng 500 nghìn 7 phong bì đựng 100 nghìn. Bốc ngẫu nhiên liên tiếp hai phong bì. Nếu biết phong bì thứ hai có 500 nghìn, tìm xác xuất để phong bì đầu tiên cũng có 500 nghìn?

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sunandabhuttan
sunandabhuttan sunandabhuttan
  • 14-06-2021

I can't understand tell me in english

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