A drawer contains 8 blue, 15 white, and 17 red socks. How many socks must be removed without looking to be sure of getting at least one matching pair?thx!
2007-09-17 08:47:31 · 7 answers · asked by Meow* 2 in Science & Mathematics ➔ Mathematics
4
1 blue, 1 white, and 1 red. When you pick a fourth sock. There will be one matching pair.
2007-09-17 08:53:28 · answer #1 · answered by 7 · 0⤊ 0⤋
4
2007-09-17 08:53:57 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋
The worst-case scenario is that you grab 3 socks, one of each color. The fourth sock will be one of those colors, giving you a match.
Therefore, if you pick 4 socks at random without looking you will have a matching pair.
2007-09-17 08:55:00 · answer #3 · answered by Mathsorcerer 7 · 0⤊ 0⤋
If you pull out four socks, you will get a pair that matches.
2007-09-17 08:52:33 · answer #4 · answered by PMP 5 · 0⤊ 0⤋
4
After 3 draws, worst case is 1 of each color. Fourth sock drawn HAS to be one of the three colors
For reasons completely unknown to me, in my house the draw would have to be 40
2007-09-17 08:58:13 · answer #5 · answered by Grampedo 7 · 0⤊ 0⤋
4
if you need one matching pair.
2007-09-17 08:53:20 · answer #6 · answered by Dan_Ye 6 · 0⤊ 0⤋
3+1 = 4
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Ideas: Assume the first three are 1b+1w+1r, then the fourth must match one of the three.
2007-09-17 08:51:31 · answer #7 · answered by sahsjing 7 · 0⤊ 0⤋