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2 năm trước
Kết quả học lực cuối học kì I năm học 2017-2018 của lớp 6A xếp thành 3 loại: Giỏi, khá, trung bình. Biết số học sinh khá bằng $\frac{6}{5}$ số học sinh giỏi, số học sinh trung bình bằng 140% số học sinh giỏi. Hỏi lớp 6A có bao nhiêu học sinh, biết rằng lớp 6A có 12 học sinh khá.
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