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The ratio between x and y is 7/9; x and y are increased by 4, what is

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The ratio between x and y is 7/9; x and y are increased by 4, what is  [#permalink]

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New post 18 Mar 2016, 00:20
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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

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Re: The ratio between x and y is 7/9; x and y are increased by 4, what is  [#permalink]

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New post 18 Mar 2016, 02:33
Ratio = 7k/9k = 7/9, 14/18, etc.

x and y are increased by 4 --> (7k + 4)/(9k + 4)

New ratio can be 11/13, 18/22, etc.

Answer: E
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Re: The ratio between x and y is 7/9; x and y are increased by 4, what is  [#permalink]

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New post 18 Mar 2016, 03:04
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

The ratio between x and y is 7 to 9 means x to y can be anything like 7/9 or 14/18 or 21/27....
Now, if you add 4 to each of numerator and denominator the new ratio of x to y will not be unique.
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The ratio between x and y is 7/9; x and y are increased by 4, what is  [#permalink]

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New post 18 Mar 2016, 05:08
x and y can be 7 and 9 in that case 11/13 can be the answer.
It can also be 14 and 18 and so on and in that case the ratio would be 9/11.
It will have different values depending on the values for x and y.
So the answer is E
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Re: The ratio between x and y is 7/9; x and y are increased by 4, what is  [#permalink]

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New post 12 Apr 2018, 16:01
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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Re: The ratio between x and y is 7/9; x and y are increased by 4, what is &nbs [#permalink] 12 Apr 2018, 16:01
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