Business, 12.07.2021 21:00 jesh0975556

Theo thống kê, ba xạ thủ A, B, C có tỷ lệ bắn trúng bia lần lượt là 70%, 75% và 60% cùng bắn vào một tấm bia (xác suất bắn trúng coi như bằng tỷ lệ bắn trúng). Gọi X là biến ngẫu nhiên chỉ số lần bắn trúng.

Bảng phân phối xác suất của X:
X 0 1 2 3
P p1 p2 p3 p4
Tìm số p2

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Theo thống kê, ba xạ thủ A, B, C có tỷ lệ bắn trúng bia lần lượt là 70%, 75% và 60% cùng bắn vào một...

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