x and y are integers and x>0, is y>0?
1) 7x-2y>0
2) -y<x
I FAILED this question soooooo miserably.
x and y are integers and x>0 is y>0?
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IMO E
Stmt 1 -
7x-2y>0
=> 7x>2y
=>y<7x/2
plug a value : say x=2, since x>0
=>y<7
=>y can be either positive or negative
Hence Insufficient
Stmt 2 -
-y<x
=> y > -x
Plug values : x = 2, since x>0
=>y > -2
=>y can be either positive or negative
Hence Insufficient
Stmt 1 and Stmt 2 -
7x/2 > y > -x
Plug values : x = 2, since x>0
=>7 > y > -2
=>y can be either positive or negative
Hence Insufficient
Note: The reason I took x=2 as the only VIC is because, all we care is to prove that the stmts are insufficient.Had the value x=2 satisfied any of these two stmts, then we should try with different values for 'x' to figure out the solution.
Stmt 1 -
7x-2y>0
=> 7x>2y
=>y<7x/2
plug a value : say x=2, since x>0
=>y<7
=>y can be either positive or negative
Hence Insufficient
Stmt 2 -
-y<x
=> y > -x
Plug values : x = 2, since x>0
=>y > -2
=>y can be either positive or negative
Hence Insufficient
Stmt 1 and Stmt 2 -
7x/2 > y > -x
Plug values : x = 2, since x>0
=>7 > y > -2
=>y can be either positive or negative
Hence Insufficient
Note: The reason I took x=2 as the only VIC is because, all we care is to prove that the stmts are insufficient.Had the value x=2 satisfied any of these two stmts, then we should try with different values for 'x' to figure out the solution.
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