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Mathematics, 07.12.2021 17:00 leasiamoore
Môt công ty kinh doanh với hóa đơn gồm 7 chữ số. Công ty phát thưởng bằng
cách dùng hàm random chọn ngẫu nhiên 1 hóa đơn từ máy vi tính. Tính xác suất số
hóa đơn trúng thưởng
a) là một số chẵn
b) là một số có số đầu tiên là số 9 và các chữ số đều khác nhau.
c) là một số có số đầu tiên là số 9, chữ số còn lại khác nhau và số lẻ.
![ansver](/tpl/images/cats/User.png)
Answers: 3
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Môt công ty kinh doanh với hóa đơn gồm 7 chữ số. Công ty phát thưởng bằng
cách dùng hàm random chọ...
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