某儿童游乐园一次购买红、黄、绿、蓝四种颜色海洋球各 100 只,混装在一个纸箱里,为确 保四种颜色的球都能取到,则至少要取出海洋球( )只。A.101 ...

作者: tihaiku 人气: - 评论: 0
问题 某儿童游乐园一次购买红、黄、绿、蓝四种颜色海洋球各 100 只,混装在一个纸箱里,为确 保四种颜色的球都能取到,则至少要取出海洋球( )只。
选项 A.101 B.201 C.301 D.400
答案 C
解析 考虑最不利的情况,先取出三种颜色全部的球,那么再取一只,四种颜色的球就都有了,即至少取3×100+1=301只。

相关内容:儿童,游乐园,颜色,海洋,球各,纸箱,为确

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