babyari18
18.09.2021 •
Mathematics
Giả sử rằng 20% tất cả các bản sao của một cuốn sách giáo khoa cụ thể không đạt được độ bền
nhất định. Gọi X là số bản sao trong 15 bản sao được chọn ngẫu nhiên không đạt thử nghiệm.
a/ Tính xác suất có tối đa 8 bản sao không đạt thử nghiệm.
b/ Tính xác suất có 8 bản sao không đạt thử nghiệm.
3/ Về măt hình học, xác suất để BNN liên tục X nhận giá trị trong đoạn (a,b) là gì?
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Ответ:
Step-by-step explanation:
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