Mathematics, 22.07.2021 06:00 NateTheBeast12

Thời gian sử dụng của một điện thoại di động là địa lượng ngẫu nhiên X có phân phối chuẩn với trung bình là 24 tháng, độ lệch chuẩn là 4 tháng. Một chiếc điện thoại được bảo hành 12 tháng. Tính xác suất để một chiếc điện thoại bị hỏng khi chưa hết thời gian bảo hành

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Thời gian sử dụng của một điện thoại di động là địa lượng ngẫu nhiên X có phân phối chuẩn với trung...

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