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Trường A tổ chức cho học sinh một lớp sáu gồm 40 học sinh tham gia học tập ngoại khoá ngoài trường , trên cơ sở đã thống nhất ý kiến với cha mẹ học sinh ( toàn bộ chi phí chuyến đi cchia đều cho mỗi học sinh ). Đến ngày đi , 4 học sinh trong lớp không tham gia được do có việc đột xuất .Vì vậy mỗi bạn tham gia còn lại phải đóng thêm 25000 đồng so với dự kiến ban đầu . Hỏi tổng chi phí chuyến đi là bao nhiêu ?
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