1 votes 1 votes Virat had 4 pairs of identical black socks and 5 pairs of identical green socks in a box. With his eyes closed he took them out one by one. How many socks should he take out before he is guaranteed to have a matching pair? [ Assume that what is taken out is not put back ] 3 5 6 10 Quantitative Aptitude go-mathematics-1 quantitative-aptitude + – Bikram asked Aug 8, 2016 Bikram 633 views answer comment Share Follow See all 7 Comments See all 7 7 Comments reply Show 4 previous comments Lucky sunda commented Jan 31, 2017 reply Follow Share But there is a sock for right leg and one for left leg. They are not same.So, there is separation?? 0 votes 0 votes Bikram commented Jan 31, 2017 reply Follow Share In case of gloves there are left gloves and right gloves but in case of socks all are identical. generally socks are identical, here we consider only general cases. 0 votes 0 votes Lucky sunda commented Jan 31, 2017 reply Follow Share okay.. thanks sir :) 0 votes 0 votes Please log in or register to add a comment.
Best answer 5 votes 5 votes The catch here is that for socks - there is no separation between left/right as for gloves. Hence, when we take out 3, we are sure to haveeither 2 black or 2 green and that should be a matching pair. For gloves, it would have been, 4 + 5 + 1 = 10. Arjun answered Sep 12, 2016 • selected Sep 13, 2016 by srestha Arjun comment Share Follow See all 2 Comments See all 2 2 Comments reply rajesh170293 commented Dec 9, 2016 reply Follow Share why not 2 –2 votes –2 votes Bikram commented Jan 31, 2017 reply Follow Share if u take 2 socks by closing eys both have same color, means it may possible both are green or both are black... but if you consider 3 there is a guarantee for a pair, here pair means 1 from black and another from green . 1 votes 1 votes Please log in or register to add a comment.
2 votes 2 votes I think the answer should be 3 not 10 . As after taking out three socks he will be having one matching pair.As if three socks are taken out ,possible order can be BWB,BBW,WWB,WBW.So we can see there is atleat one matching pair of sock. nkg_master9 answered Dec 16, 2016 nkg_master9 comment Share Follow See 1 comment See all 1 1 comment reply Bikram commented Jan 31, 2017 reply Follow Share @nkg_master9 Answer is 3 not 10, read carefully what Arjun said, he said in case of gloves there are left gloves and right gloves but in case of socks all are identical. 1 votes 1 votes Please log in or register to add a comment.