标有"A","B","C","D","E"的小球各10个,至少有抽多少个球,才保证其中至少有两个字母相同的小球?
问题描述:
标有"A","B","C","D","E"的小球各10个,至少有抽多少个球,才保证其中至少有两个字母相同的小球?
答
6.至少 .
标有"A","B","C","D","E"的小球各10个,至少有抽多少个球,才保证其中至少有两个字母相同的小球?
6.至少 .