Bunuel wrote:

The ratio between x and y is 7/9; x and y are increased by 4, what is the ratio between the new values of x and y?

A) 7/9

B) 14/9

C) 7/18

D) 11/13

E) It Cannot Be Determined

We see that x : y = 7n : 9n

So x and y can be 7 and 9, 14 and 18, 21 and 27, etc.

Increasing both x and y by 4 will create a new ratio depending on the original values of x and y. Since we don’t know the actual original values of x and y, we cannot determine the new ratio.

Answer: E

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