• NEW! FREE Beat The GMAT Quizzes
    NEW! FREE Beat The GMAT Quizzes
    NEW! FREE Beat The GMAT Quizzes
    Hundreds of Questions Highly Detailed Reporting Expert Explanations TAKE A FREE GMAT QUIZ
  • 7 CATs FREE!
    If you earn 100 Forum Points

    Engage in the Beat The GMAT forums to earn
    100 points for $49 worth of Veritas practice GMATs FREE

    Veritas Prep
    VERITAS PRACTICE GMAT EXAMS
    Earn 10 Points Per Post
    Earn 10 Points Per Thanks
    Earn 10 Points Per Upvote
    REDEEM NOW

A recent lunch meeting at a certain club was attended by mem

This topic has 1 expert reply and 0 member replies

A recent lunch meeting at a certain club was attended by mem

Post

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

Difficult



A recent lunch meeting at a certain club was attended by members and guests. Each member paid $4 for the lunch and each guest paid $8 for the lunch. How many of the people attending the meeting were members

(1) A total of 20 people attended the meeting.

(2) A total of $92 was paid for the lunch

OA C

Source: GMAT Prep

  • +1 Upvote Post
  • Quote
  • Flag
Post
BTGmoderatorDC wrote:
A recent lunch meeting at a certain club was attended by members and guests. Each member paid $4 for the lunch and each guest paid $8 for the lunch. How many of the people attending the meeting were members?

(1) A total of 20 people attended the meeting.

(2) A total of $92 was paid for the lunch

OA C

Source: GMAT Prep
Say the number of members was x and the number of guests was y; thus, the total number of people = x + y.

We have to get the value of x.

Let's take each statement one by one.

(1) A total of 20 people attended the meeting.

=> x + y = 20. Can't get the unique value of x. Insufficient.

(2) A total of $92 was paid for the lunch.

=> 4x + 8y = 92. Can't get the unique value of x. Insufficient.

(1) and (2) together

So, we have two unique linear equations (x + y = 20 and 4x + 8y = 92), ensuring unique values of x and y. Sufficient.

There is no need to calculate the value since this is a DS question; in DS question, we just need to to be sure that we would get the unique value.

The correct answer: C

Hope this helps!

-Jay
_________________
Manhattan Review

Locations: Manhattan Review Chennai | GMAT Prep Himayatnagar | GRE Prep Hyderabad | Bangalore GRE Coaching | and many more...

Schedule your free consultation with an experienced GMAT Prep Advisor! Click here.

  • +1 Upvote Post
  • Quote
  • Flag
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh
  • Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • The Princeton Review
    FREE GMAT Exam
    Know how you'd score today for $0

    Available with Beat the GMAT members only code

    MORE DETAILS
    The Princeton Review
  • PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep

Top First Responders*

1 Jay@ManhattanReview 68 first replies
2 fskilnik@GMATH 54 first replies
3 Brent@GMATPrepNow 48 first replies
4 GMATGuruNY 31 first replies
5 Rich.C@EMPOWERgma... 27 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

Most Active Experts

1 image description fskilnik@GMATH

GMATH Teacher

110 posts
2 image description Max@Math Revolution

Math Revolution

94 posts
3 image description Brent@GMATPrepNow

GMAT Prep Now Teacher

93 posts
4 image description Jay@ManhattanReview

Manhattan Review

84 posts
5 image description GMATGuruNY

The Princeton Review Teacher

77 posts
See More Top Beat The GMAT Experts