Bài 4. Hưởng ứng giải cứu dưa hấu, dì Hoa đã mua 100 quả dưa hấu của bà con nông dân với giá 20 000 đồng/ quả. Dì Hoa chở về gần nhà bán và thu được 2 500 000 đồng. Sau khi bán hết, dì tặng toàn bộ tiền lãi cho bà con nông dân. Hỏi: a) Dì Hoa đã lãi được bao nhiêu tiền? b) Dì Hoa đã lãi được bao nhiêu phần trăm? Giải giúp Mik với. Mik cảm ơn 😊😊

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