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value of x

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by sanju09 » Wed Sep 15, 2010 1:01 am
What is the value of x ?

[1] x y = 6.

[2] x + y = 5.


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by alivapriyada » Wed Sep 15, 2010 2:36 am
sanju09 wrote:What is the value of x ?

[1] x y = 6.

[2] x + y = 5.


[spoiler]Source: https://readyforgmat.com[/spoiler]
statement 1 : xy=6
x=6/y

not sufficient

statement 2 : x+y=5

not sufficient

combining both

x+y=5
6/x+x=5
6+x^2=5x
x^2-5x+6=0
x^2-2x-3x+6=0
x(x-2)-3(x-2)=0
so x=3 or x=2

not sufficient
hence E
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