JNU

[anon_econ]

In a rectangular array (matrix) of distinct positive numbers, which has m rows and n columns, let x denote the largest of the smallest number in each column, and y the smallest of the largest number in each row. Then one can infer:
a) x>=y
b)y>=x
c)x=y
d)none of the above
somebody please help!!!!!

[aastha]

hie sumedha

though i am not very sure , but i think its y>= x

[anon_econ]

Ok what's going on? My friend uses my computer to post something, then i log in so my name appears in the post? :S

[Amit Goyal]

y >= x is correct
Proof: Refer problem number 16 on pages 8 - 9 of the following http://economicsentrance.weebly.com/uploads/1/1/0/5/1105777/notes_1.pdf