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linhhyy98
2 năm trước
lớp 9a có 40 học sinh dự kiến cùng tham gia một buổi lao động trồng cây nhân dịp đầu xuân .cô giáo chủ nhiệm giao cho mỗi bạn nam phải trồng 3 cây,mỗi bạn nữ trồng hai cây.do 2 bạn nữ và một bạn nam vắng mặt nên kết thúc buổi lao động cả lớp đã trồng được 92 cây .hỏi lớp 9a có bao nhiêu học sinh nam bao nhiêu học sinh nữ
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