Gmat prep 1 Ques

[abhinav85]

If m,r,x & y are positive ,is the ratio of m to r equal to the ratio of x to y?

A) The ratio of m to y is equal to the ratio of x to r.

B) The ratio of m + n to r + y is equal to the ratio of x to y.


B

[brick2009]

How can B be the answer?

Where did u get "n"....is your question incomplete..or did i miss something?

clarify plz..

[abhinav85]

Ya its M + x instead of M + n

[shargaur]

If m,r,x & y are positive ,is the ratio of m to r equal to the ratio of x to y?

A) The ratio of m to y is equal to the ratio of x to r.

B) The ratio of m + n to r + y is equal to the ratio of x to y.

let question be m:r=x:y
or my=rx

st1: m:y=x:r
=> mr=yx insufficient
st2: m+x:r+y = x:y
cross multiply my+xy = rx+xy
because x& y is postive so is xy
my=rx
st2 is sufficeint

Hence B. Did i missed somewhere