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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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New post Updated on: 24 Mar 2012, 01:20
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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.
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Re: The ratio of two quantities is 3 to 4. If each of the  [#permalink]

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New post 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.

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

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New post 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.
Answer is E.

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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New post 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.

Answer: E.



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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New post 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.

Answer: E.



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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New post 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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New post 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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New post 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

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

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New post 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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PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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

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New post 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

\(\frac{3x+5}{4x+5}\)

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

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New post 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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New post 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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