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Each of 435 bags contains at least one of the following

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Each of 435 bags contains at least one of the following [#permalink] New post 20 Feb 2012, 12:12
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Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350
[Reveal] Spoiler: OA
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Re: Each of 435 bags contains at least one of the following [#permalink] New post 20 Feb 2012, 13:38
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docabuzar wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350


Fill the diagram step by step:
Attachment:
Raisins, almonds, and peanuts.PNG
Raisins, almonds, and peanuts.PNG [ 6.49 KiB | Viewed 4836 times ]
Also given that there are total of 435 bags and 210 bags contain almonds.

From the diagram 20y=5x --> y=x/4. Now, Total=435={Almonds}+10x+y+x --> 435=210+10x+x/4+x --> x=20 --> # of bags that contain only one kind of item is the sum of yellow segments: 10x+x+5x=16x=320.

Answer: D.
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Re: Each of 435 bags contains at least one of the following [#permalink] New post 12 Aug 2013, 06:59
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docabuzar wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350

My shortcut solution:
Attachments

ratio application.png
ratio application.png [ 36.31 KiB | Viewed 2702 times ]


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Re: Each of 435 bags contains at least one of the following [#permalink] New post 14 Aug 2013, 09:57
Bunuel wrote:
docabuzar wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350


Fill the diagram step by step:
Attachment:
Raisins, almonds, and peanuts.PNG
Also given that there are total of 435 bags and 210 bags contain almonds.

From the diagram 20y=5x --> y=x/4. Now, Total=435={Almonds}+10x+y+x --> 435=210+10x+x/4+x --> x=20 --> # of bags that contain only one kind of item is the sum of yellow segments: 10x+x+5x=16x=320.

Answer: D.


Hi Bunuel,

I am unable to understand. Can you please elaborate?
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Re: Each of 435 bags contains at least one of the following [#permalink] New post 14 Aug 2013, 10:36
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Diipz wrote:
Bunuel wrote:
docabuzar wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350


Fill the diagram step by step:
Attachment:
Raisins, almonds, and peanuts.PNG
Also given that there are total of 435 bags and 210 bags contain almonds.

From the diagram 20y=5x --> y=x/4. Now, Total=435={Almonds}+10x+y+x --> 435=210+10x+x/4+x --> x=20 --> # of bags that contain only one kind of item is the sum of yellow segments: 10x+x+5x=16x=320.

Answer: D.


Hi Bunuel,

I am unable to understand. Can you please elaborate?


Please tell me what exactly didn't you understand. Thank you.
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COLLECTION OF QUESTIONS:
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

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: Each of 435 bags contains at least one of the following [#permalink] New post 14 Aug 2013, 10:42
Diipz wrote:
Bunuel wrote:
docabuzar wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350


Fill the diagram step by step:
Attachment:
Raisins, almonds, and peanuts.PNG
Also given that there are total of 435 bags and 210 bags contain almonds.

From the diagram 20y=5x --> y=x/4. Now, Total=435={Almonds}+10x+y+x --> 435=210+10x+x/4+x --> x=20 --> # of bags that contain only one kind of item is the sum of yellow segments: 10x+x+5x=16x=320.

Answer: D.


Hi Bunuel,

I am unable to understand. Can you please elaborate?


The value of almonds from the venn diagram. 20y=5x. Also the explanation leading to the target. Thanks.
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Re: Each of 435 bags contains at least one of the following [#permalink] New post 14 Aug 2013, 11:00
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Diipz wrote:
Diipz wrote:
Bunuel wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350

Fill the diagram step by step:
Attachment:
Raisins, almonds, and peanuts.PNG
Also given that there are total of 435 bags and 210 bags contain almonds.

From the diagram 20y=5x --> y=x/4. Now, Total=435={Almonds}+10x+y+x --> 435=210+10x+x/4+x --> x=20 --> # of bags that contain only one kind of item is the sum of yellow segments: 10x+x+5x=16x=320.

Answer: D.


Hi Bunuel,

I am unable to understand. Can you please elaborate?


The value of almonds from the venn diagram. 20y=5x. Also the explanation leading to the target. Thanks.


The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts --> {only raisins and peanuts} = y --> {only almonds}=20y;

The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds --> {only peanuts}=x --> {only peanuts}={only almonds}/5 --> x={only almonds}/5 --> {only almonds}=5x.

{only almonds}=5x=20y --> y=x/4.

Total=435={Almonds}+10x+y+x --> 435=210+10x+x/4+x

What else?
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NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
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

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: Each of 435 bags contains at least one of the following [#permalink] New post 23 Oct 2013, 16:08
Asifpirlo wrote:
docabuzar wrote:
Each of 435 bags contains at least one of the following three items: raisins, almonds, and peanuts. The number of bags that contain only raisins is 10 times the number of bags that contain only peanuts. The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. The number of bags that contain only peanuts is one-fifth the number of bags that contain only almonds. 210 bags contain almonds. How many bags contain only one kind of item?

A. 256
B. 260
C. 316
D. 320
E. 350

My shortcut solution:


I really liked your method but 256 is also divisible by 16? Why wouldnt that we an answer?//
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Re: Each of 435 bags contains at least one of the following [#permalink] New post 17 Nov 2013, 19:49
Bunuel,

I would really appreciate your help. When I read this: "The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. ". I thought that the number of bags that only contain almonds is equal to the number of bags that contain raisins and the number of bags that only contain peanuts. So I said A=20*(10x+x)=20*(11x). Rather than what you had which is the 20y, where y is the number of bags that are a mixtures of both raisins and peanuts.

This is more of an english question but how is "only" used in word problems on the GMAT. When I get question with an "only A & B" is this equal to ("only" A) & ("only" B). Or should I interpret it as "only" (A&B)
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Re: Each of 435 bags contains at least one of the following [#permalink] New post 17 Nov 2013, 20:20
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alphabeta1234 wrote:
Bunuel,

I would really appreciate your help. When I read this: "The number of bags that contain only almonds is 20 times the number of bags that contain only raisins and peanuts. ". I thought that the number of bags that only contain almonds is equal to the number of bags that contain raisins and the number of bags that only contain peanuts. So I said A=20*(10x+x)=20*(11x). Rather than what you had which is the 20y, where y is the number of bags that are a mixtures of both raisins and peanuts.

This is more of an english question but how is "only" used in word problems on the GMAT. When I get question with an "only A & B" is this equal to ("only" A) & ("only" B). Or should I interpret it as "only" (A&B)


Interpretation usually depends on the context.
'Bag containing only A and B' means the bag has A and B only, not say C.
If the question wants to imply only A and only B, it will clarify as such. The bag containing only A and the bag containing only B.

Note that here you have assumed that the statement implies this:
The number of bags that contain only almonds is 20 times the sum of the number of bags that contain only raisins and the number of bags that contain only peanuts.
If number of bags of almonds is 20 times the sum of 2 other numbers, they will specify it as such.
In the question they only give number of bags of almonds is 20 times the number of bags of only raisins and peanuts (which means that the intersection of all 3 in not included). So one number of bags is equal to another number of bags, not sum of two other numbers of bags.
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Re: Each of 435 bags contains at least one of the following   [#permalink] 17 Nov 2013, 20:20
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