Abhishek009 wrote:
Bunuel wrote:
If a/b = 1/2, then the numerical value of which of the following expressions cannot be determined?
A. 2a/b
B. (a + b)/a
C. (a + 1)/(b + 1)
D. (a - 3b)/(a + b)
E. 6a – 3b
Plug in the value of a = 1 and b = 2
A. 2a/b => 2/1 = 1
B. (a + b)/a => 3/1 =3C. (a + 1)/(b + 1) = 2/3D. (a - 3b)/(a + b) => -5/3E. 6a – 3b => 6 - 6 =0
I am getting both C and D , someone plz confirm where i am getting wrong....
Hi
Abhishek009I think the issue might be because we can't take values of a and b here .
a=k
b=2k
k can any non zero number
if we take a= 2 and b=4
then (a + 1)/(b + 1) = (2+1)/(4+1) = 3/5
But for other options we will get the same answer. In my opinion the issue is due to fact that except option C , either we take the ratio of a and b or are
performing some operation on a and b ( in numerator or denominator) and then we take the ratio .
A. 2a/b = 2* 2/4= 1
B. (a + b)/a = (2+4)/2 = 6/2=3
D.(a - 3b)/(a + b) = (2- 3*4)/(2+4) = (-10)/6 = -5/3
E. 6a- 3b = 6*2 - 3*4= 0
Hope it helps!!
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