Stmt 1
x/y =1
so x =y Insuff
Stmt 2
XY=1
x =1 ,y =1 YEs
x =3, y = 1/3 No
So Insuff
Now, taking 2 together :
x = y ; xy =1
if xy has to be 1 and x =y , then there is no other value x =1
coz xy =1 , if x=y
putting it back x^2 =1
x= +1 or -1
but x>0
So, x =1
Hence C
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Source: Beat The GMAT — Data Sufficiency |
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ronniecoleman
- Legendary Member
- Posts: 546
- Location: New Delhi , India
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f x and y are greater than 0, is x=1?
1) x/y=1
2) xy=1
a) x/y insuff
x and y can be any values..
b) xy = 1
x = 2 , y = 1/2
and many more values..
together
x = y
x^2 = 1
x= -1 or 1
but x > 0
so x = 1
choose C
1) x/y=1
2) xy=1
a) x/y insuff
x and y can be any values..
b) xy = 1
x = 2 , y = 1/2
and many more values..
together
x = y
x^2 = 1
x= -1 or 1
but x > 0
so x = 1
choose C
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