Hello Everyone,
Can anyone help me to understand this concept ?
Q. Is x < y ?
(1) The ratio of x to y is 7/9.
(2) xy > 0
OA E
First of all I understand that St 2 by its own is insufficient to solve this question as it [spoiler]doesn't[/spoiler] tell us any relation between x and y.
My main question is : When I solved this question, I choose A because, I did this :-
x/y = 7/9 < 1 ...so we can say x<y
But, after giving a second thought I noted that both x and y could both be negative and still the ratio would be 7/9... which will yield x>y.. and thus we will choose E
So, how do we know which method to choose basic algebra or method of substitution ? Or is it just a matter of practice?
Thank You
Can anyone help me to understand this concept ?
Q. Is x < y ?
(1) The ratio of x to y is 7/9.
(2) xy > 0
OA E
First of all I understand that St 2 by its own is insufficient to solve this question as it [spoiler]doesn't[/spoiler] tell us any relation between x and y.
My main question is : When I solved this question, I choose A because, I did this :-
x/y = 7/9 < 1 ...so we can say x<y
But, after giving a second thought I noted that both x and y could both be negative and still the ratio would be 7/9... which will yield x>y.. and thus we will choose E
So, how do we know which method to choose basic algebra or method of substitution ? Or is it just a matter of practice?
Thank You
