有一个问题,我不确定,求有经验者帮忙!是SSAT数学题How many socks would you need to remove from a drawer containing 10 blue socks,15 black socks,and 5 red socks,to insure that you have at least 2 matching socks?A) 3B) 4C) 16D) 17E) 28
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有一个问题,我不确定,求有经验者帮忙!是SSAT数学题How many socks would you need to remove from a drawer containing 10 blue socks,15 black socks,and 5 red socks,to insure that you have at least 2 matching socks?A) 3B) 4C) 16D) 17E) 28
有一个问题,我不确定,求有经验者帮忙!是SSAT数学题
How many socks would you need to remove from a drawer containing 10 blue socks,15 black socks,and 5 red socks,to insure that you have at least 2 matching socks?
A) 3
B) 4
C) 16
D) 17
E) 28
有一个问题,我不确定,求有经验者帮忙!是SSAT数学题How many socks would you need to remove from a drawer containing 10 blue socks,15 black socks,and 5 red socks,to insure that you have at least 2 matching socks?A) 3B) 4C) 16D) 17E) 28
答案：B) 4
解析：
The worst case of getting no matching socks is to get one of each color,i.e.3.If you pick one more,there must be 2 matching.Therefore we only need 4 socks to insure 2 matching socks.