4+5+1=10(个);
答:从中摸出10球,才能保证每种颜色的球至少有一个.
故答案为:10个.
箱子中有3个红球,4个白球和5个蓝球,从中摸出_ 球,才能保证每种颜色的球至少有一个.
箱子中有3个红球,4个白球和5个蓝球,从中摸出______ 球,才能保证每种颜色的球至少有一个.
数学人气:478 ℃时间:2020-04-04 12:20:54
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