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# The ratio of two quantities is 3 to 4. If each of the

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The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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Updated on: 24 Mar 2012, 01:20
2
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Difficulty:

25% (medium)

Question Stats:

67% (00:38) correct 33% (00:30) wrong based on 395 sessions

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The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities?

A. 3/4
B. 8/9
C. 18/19
D. 23/24
E. It cannot be determined from the information given.

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Originally posted by calreg11 on 23 Mar 2012, 21:16.
Last edited by Bunuel on 24 Mar 2012, 01:20, edited 1 time in total.
Edited the question
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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24 Mar 2012, 01:27
4
2
calreg11 wrote:
The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities?

A. 3/4
B. 8/9
C. 18/19
D. 23/24
E. It cannot be determined from the information given.

You can solve this question if you look at it conceptually: if the two numbers are 3 and 4 then adding 5 to each number will have a huge impact on the ratio but if the two numbers are 3,000,000 and 4,000,000 then adding 5 to each number will have very little impact on the ratio. So, the new ratio cannot be determined from the information given.

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Re: The ratio of two quantities is 3to4  [#permalink]

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23 Mar 2012, 23:47
2
2
calreg11 wrote:
The ratio of two quantities is 3to4.If each of the quantities is increased by 5, what is the ratio of these two new quantities?

a. 3/4
b. 8/9
c. 18/19
d. 23/24
e. It cannot be determined with the information given.

let the actual ratio be 3k/4k, increase numerator and denominator by 5 => 3k+5/4k+5
Until the value of k is unknown we can not determine the actual ratio.
OR
let the actual be 3/4. After increasing 5 => 8/9
let the actual be 6/8. After increasing 5 => 11/13

Therefore without actual quantities we cannot determine the actual ratio.

Hope this helps.
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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21 Jun 2013, 01:45
Bunuel wrote:
calreg11 wrote:
The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities?

A. 3/4
B. 8/9
C. 18/19
D. 23/24
E. It cannot be determined from the information given.

You can solve this question if you look at it conceptually: if the two numbers are 3 and 4 then adding 5 to each number will have a huge impact on the ratio but if the two numbers are 3,000,000 and 4,000,000 then adding 5 to each number will have very little impact on the ratio. So, the new ratio cannot be determined from the information given.

Bunuel do you think that such question could still appear during the exam ?? just to know
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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21 Jun 2013, 01:48
carcass wrote:
Bunuel wrote:
calreg11 wrote:
The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities?

A. 3/4
B. 8/9
C. 18/19
D. 23/24
E. It cannot be determined from the information given.

You can solve this question if you look at it conceptually: if the two numbers are 3 and 4 then adding 5 to each number will have a huge impact on the ratio but if the two numbers are 3,000,000 and 4,000,000 then adding 5 to each number will have very little impact on the ratio. So, the new ratio cannot be determined from the information given.

Bunuel do you think that such question could still appear during the exam ??

Hard to say...

Are you asking because of option E?
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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21 Jun 2013, 02:03
Yes. Basically I know that when you encounter a question where option E is among, then it is never the answer (or at least this is the common place)

the reason is that : iof gmat ask you a question says "is impossible to answer" could be to simple, so a trap answer......for this reason I am asking your opinion about.
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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22 Jun 2013, 02:37
carcass wrote:
Yes. Basically I know that when you encounter a question where option E is among, then it is never the answer (or at least this is the common place)

the reason is that : iof gmat ask you a question says "is impossible to answer" could be to simple, so a trap answer......for this reason I am asking your opinion about.

This question is marked as 'from Official guide' though.
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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02 Oct 2013, 00:58
calreg11 wrote:
The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities?

A. 3/4
B. 8/9
C. 18/19
D. 23/24
E. It cannot be determined from the information given.

I have a small doubt :

Cant the answer be 2 .

As if we originally take the numbers 3 and 4 which satisfies the ratio of 2 quantities be 3:4 and the ratio of increased quantities be 8/9.

I was trying to solve the question without reading the answer choices ans when I find out I cannot solve it . I try to follow hit and trial and 8/9 is there in the options and answered B.

Can any one clear this please ?

Regards,
Abhinav

580 to 700 + in one month difficult but not impossible
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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02 Oct 2013, 03:02
abhinav11 wrote:
calreg11 wrote:
The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities?

A. 3/4
B. 8/9
C. 18/19
D. 23/24
E. It cannot be determined from the information given.

I have a small doubt :

Cant the answer be 2 .

As if we originally take the numbers 3 and 4 which satisfies the ratio of 2 quantities be 3:4 and the ratio of increased quantities be 8/9.

I was trying to solve the question without reading the answer choices ans when I find out I cannot solve it . I try to follow hit and trial and 8/9 is there in the options and answered B.

Can any one clear this please ?

Regards,
Abhinav

580 to 700 + in one month difficult but not impossible

But if the numbers are different, say 6 and 8, then the new ratio will also be different. Thus you cannot say for sure that the numbers are 3 and 4. Check here a solution: the-ratio-of-two-quantities-is-3-to-4-if-each-of-the-129569.html#p1064455
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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28 Oct 2014, 01:12
Say the quantities are 3x & 4x

There ratio would be $$\frac{3x}{4x} = \frac{3}{4}$$

After adding 5 to each, new ratio is

$$\frac{3x+5}{4x+5}$$

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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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14 Jan 2015, 16:27
Hey,

I also started in the same way as Paresh, but giving different values to the quantities; I then tried to find the actual quantities, like this:

x/y = 3/4
4x=3y
x=3y/4

Then, the new ratio will be:
(x+5)/(y+5), here I substitued the above value for x:
(3y/4+5) / (y+5)
(3y+20)/(4y+20) since y is in any case y, then we add the same, so the ratio of 3/4 actually corresponds to the quantities.

Then, if we add 5 to each it would be 8/9.

I don't know if this makes any sense at all. But, we know that the 2 quantities cannot be the same. So, why are we using the same values (let's say x) above?
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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14 Jan 2015, 18:54
pacifist85 wrote:
Hey,

I also started in the same way as Paresh, but giving different values to the quantities; I then tried to find the actual quantities, like this:

x/y = 3/4
4x=3y
x=3y/4

Then, the new ratio will be:
(x+5)/(y+5), here I substitued the above value for x:
(3y/4+5) / (y+5)
(3y+20)/(4y+20) since y is in any case y, then we add the same, so the ratio of 3/4 actually corresponds to the quantities.

Then, if we add 5 to each it would be 8/9.

I don't know if this makes any sense at all. But, we know that the 2 quantities cannot be the same. So, why are we using the same values (let's say x) above?

Ratios are pure numeric. For example, the ratio of 4 kg mangoes to 8 kg oranges = 1:2

Putting the same variable (as I did) is just for convenience
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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