There are 5 distinct pair of white socks and 5 pairs of black socks in a cupboard. In the dark, how many socks do I have to pull out to ensure that I have atleast 1 correct pair of white socks.
2007-09-15 15:47:05 · 10 answers · asked by Harry 1 in Science & Mathematics ➔ Mathematics
Half the socks are black & half are white.
There are 10 pairs, or 20 socks total.
You need to remove more than half to be sure.
So that's 12 socks or 6 pair in total.
2007-09-15 15:58:10 · answer #1 · answered by Robert S 7 · 0⤊ 1⤋
you have 10 white socks and 10 black socks. This is 2 colors.
20 x 2! = 20 x 2 x 2 = 40 or 20+2!=24 I'm not sure
2007-09-15 16:01:23 · answer #2 · answered by Freesia 5 · 0⤊ 0⤋
it's 12
it when all 5 pairs of back socks are picked out, the remaining are white. So the get a pair of white you must picking 2 white.
10 + 2 = 12
2007-09-15 15:57:46 · answer #3 · answered by 7 · 0⤊ 0⤋
i didn't take my time doing this but i have an educated guess of 4 times good luck. or do the experiment yourself. you do want the times you take out a pair of socks to be a low number like around 3 don't you?? or it does it matter...
2007-09-15 15:51:00 · answer #4 · answered by ƒαη¢нσηєѕѕ тнє нυηтяєѕѕ 4 · 0⤊ 0⤋
12 if you want to make certain. The first ten could all be black!
2007-09-15 15:55:08 · answer #5 · answered by pseudospin 2 · 0⤊ 0⤋
I agree- 12.
2007-09-15 15:58:35 · answer #6 · answered by niffer 3 · 0⤊ 0⤋
well six if u have to make sure
2007-09-15 15:50:31 · answer #7 · answered by penguins.are.koo 4 · 0⤊ 0⤋
six
2007-09-15 15:54:49 · answer #8 · answered by Music Man 2 · 0⤊ 0⤋
six
2007-09-15 15:50:48 · answer #9 · answered by Pakyuol 7 · 0⤊ 0⤋
xD
2007-09-15 15:53:57 · answer #10 · answered by Anonymous · 0⤊ 0⤋