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	Các bình luận về: Gieo ba đồng xu cân đối, đồng chất. Xác suất để có đúng hai đồng xu xuất hiện mặt sấp là:	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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