Mathematics, 23.10.2021 16:00 y0gurlk

Bạn Duy có tất cả 30 viên bi gồm ba loại màu: màu xanh; màu đỏ và vàng. biết số viên bi màu đỏ, màu vàng, màu xanh lần lượt tỉ lệ với các số 2;3;5. Hỏi bạn Duy có bao nhiêu viên bi màu đỏ, vàng, xanh?

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Bạn Duy có tất cả 30 viên bi gồm ba loại màu: màu xanh; màu đỏ và vàng. biết số viên bi màu đỏ, màu...