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ntpkim.abc9htkhang
2 năm trước
Lớp 6a có 42 học sinh. Cuối năm, các em được xếp lọa học lực có 3 mức độ:Giỏi, khá, trung bình. Biết số học sinh giỏi bằng 1/4 lớp; số hs khá bằng 5/13 số hs còn lại. a/ Tính số hs trung bình lớp 6A b/Số hs trung bình chiếm tỉ lệ phần trăm hs cả lớp
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