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sameerballani
- Legendary Member
- Posts: 544
- Joined: Mon Dec 27, 2010 8:10 am•Followed by: 2 members
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Hi,
From(1):
if x=2, y=3 then x(y+1) = 8 is even
if x=3, y=2 then x(y+1) = 9 (not even)
Not sufficient
From(2):
No info. about x.
Not sufficient
Both(1)&(2):
y is prime and greater than 7. So y has to be odd. So, y+1 is even
So, x(y+1) is also even
Sufficient
Hence, C
