I have a doubt in one data sufficiency question of mba.com test. Can anyone please explain? The question is as follows.
What is the value of xy?
1. y = x + 1
2. y = x^2 + 1
stmnt1 - y = x+1 will not help us to get value of xy as we do not know the value of x. hence insuff
stmnt2 - y = x^2 + 1 same as 1. hence insuff
taking together we get x+ 1 = x^2 + 1 . we get x^2 = x . here x can be both 1 or 0
so we will get 2 different values for xy and even together both are not sufficient.
will go with E