-
Deepthi Subbu
- Master | Next Rank: 500 Posts
- Posts: 298
- Joined: Tue Feb 16, 2010 1:09 am•Followed by: 1 member
- Thanked: 2 times
hi hope that the answer is E here
(1) x=0, y=2, xy=0<9 no
x=1,y=10, xy=10>9 yes, so insuff
(2)y=0, x=2, xy=0<9 no
x=9,y=2, xy=18>9 yes. again insuff
from both we can see that
2<=x<=4, and 2<=y<=4
x=2,y=2, xy=4<9 no
x=4,y=4, xy=16>9 yes
so E
