schumi_gmat wrote:y>=0, what is value of x?
1. mod(x-3) >=y
2. mod (x-3)<= -y
[spoiler]OA = B[/spoiler]
This question needs an explanation, and that explanation is what the heck the MOD function is...Engineers will not have a problem with this question but rest of the people can wonder what MOD is:
The modulus function returns positive value of a variable or an expression. For this reason, this function is also referred as absolute value function. In reference to modulus of an independent variable, the function results in a non-negative value of the variable, irrespective of whether independent variable is positive or negative. [/i]
1. mod(x-3) >=y
|x-3| >= y.
x >= y+3
INSUF
2. mod (x-3)<= -y
|x-3|<=-y => y=0 Remember the mod function is non-negati
|x-3|=0
x=3
SUFF
Hence , B
[/i]
