GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 16 Jul 2018, 02:01

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

A cafeteria served hamburgers and hot dogs on a certain day. If the co

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47012
A cafeteria served hamburgers and hot dogs on a certain day. If the co [#permalink]

Show Tags

New post 01 Aug 2017, 12:24
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

88% (01:04) correct 12% (00:26) wrong based on 31 sessions

HideShow timer Statistics

A cafeteria served hamburgers and hot dogs on a certain day. If the cost of each hamburger was $5 and the cost of each hot dog was $3, what was the total cost of the hamburgers and hot dogs served by the cafeteria that day?

(1) The total number of hamburgers and hot dogs served was 130.

(2) The ratio of the number of hamburgers to the number of hot dogs served was 3 to 2.

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Manager
Manager
User avatar
S
Joined: 11 Jul 2016
Posts: 54
Location: India
Concentration: Technology, General Management
GMAT 1: 550 Q36 V30
GPA: 3.65
WE: Information Technology (Consulting)
Re: A cafeteria served hamburgers and hot dogs on a certain day. If the co [#permalink]

Show Tags

New post 01 Aug 2017, 12:47
Let, hamburger=x hotdogs=y
We have to find 5x+3y=?

Statement 1: x+y=130
Individually x and y can have infinite values to add upto 130.
Insufficient.

Statement 2: x/y=3/2. --> x=(3y)/2

Combining 1 and 2:
(3y)/2+ y=130
We get value of y and hence also value of x...finially giving the ultimate result for 5x+3y.

Ans: C
Intern
Intern
avatar
B
Joined: 08 Nov 2016
Posts: 16
Location: United Arab Emirates
Schools: Haas '20
GMAT 1: 620 Q44 V33
GPA: 3.76
Re: A cafeteria served hamburgers and hot dogs on a certain day. If the co [#permalink]

Show Tags

New post 01 Aug 2017, 12:49
Answer is C

Simplifying the question stem gives us the following equation 5x +3y = ?. Where x is the number of hamburgers and y is the number of hot dogs. We need to find what "?" Is.

Statement 1 gives us the equation x+y=130 but this could mean x=100 and y=30 or x=30 and y=100, each of those gives us a different answer for "?" Therefore this statement is NOT SUFFICIENT

Statement 2 tells us that the Ham:Hot is 3:2, this again doesn't give us enough information since x could be 3 and y could be 2 or x=30 and y=20. Both of those would give different answers for "?" Therefore this statement is NOT SUFFICIENT

1+2, now that we know the total number of hamburgers and hamburgers and the ratio for each, we can find what x and y are since we can find the common multiplier for the ratio z. 3z + 2z = 5z => 5z = 130 => z=26. 3(26) = 78 hamburgers and 2(26) = 52 Hot dogs. Now we can find the total cost. Therefore these two statements together are sufficient
Re: A cafeteria served hamburgers and hot dogs on a certain day. If the co   [#permalink] 01 Aug 2017, 12:49
Display posts from previous: Sort by

A cafeteria served hamburgers and hot dogs on a certain day. If the co

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.