huongtra0208 huongtra0208
  • 13-01-2024
  • Mathematics
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Tuổi thọ của một loại cây là đại lượng ngẫu nhiên có phân phối chuẩn với tuổi thọ trung bình là 6 năm và độ lệch chuẩn 2 năm. Tính xác suất một cây được trồng ngẫu nhiên có tuổi thọ từ 3 năm đến 8 năm.

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