BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

set 28 q 37

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 144
Joined: Fri Apr 13, 2007 2:25 am
by radhika1306 » Mon Sep 17, 2007 6:52 pm
In a meeting of 3 representatives from each of 6 different companies, each person shook hands
with every person not from his or her own company. If the representatives did not shake hands
with people from their own company, how many handshakes took place?
A. 45
B. 135
C. 144
D. 270
E. 288
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 321
Joined: Tue Aug 28, 2007 5:42 am
Thanked: 1 times

by kajcha » Mon Sep 17, 2007 7:05 pm
Ans D

There are 18 people in conf and each shaked hand with 15 people

So 18*15 = 270
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Senior | Next Rank: 100 Posts
Posts: 45
Joined: Wed Jun 20, 2007 12:40 pm
Location: Cleveland, OH

by niks_01.27 » Mon Sep 17, 2007 7:06 pm
There are total 18 person. Each person shook hands 15 persons (leaving 2 from his own company and 1, himself).

So total nbr of hand shakes are 15 x 18 = 270.

Whats the answer?
regards
niks...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Senior | Next Rank: 100 Posts
Posts: 45
Joined: Wed Jun 20, 2007 12:40 pm
Location: Cleveland, OH

by niks_01.27 » Mon Sep 17, 2007 7:28 pm
Anonymous wrote:I am getting (B) as the answer.

Team 1 shakes hand with 15 people and hence 3x15 =45
Team 2 has already shaked hands with Team 1.
Team 2 shakes hand with 12 people and hence 3x12 =36
and so on gives,

3x15+3x12+3x9+3x6+3x3=45+36+27+18+9=135.
My bad, I was in a hurry to solve the question. Your answer makes sense.
regards
niks...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 144
Joined: Fri Apr 13, 2007 2:25 am

by radhika1306 » Tue Sep 18, 2007 7:39 am
Answer is B
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 55
Joined: Wed Mar 18, 2009 9:56 am
Thanked: 2 times

by apple100 » Sun Mar 22, 2009 3:17 pm
Anonymous wrote:I am getting (B) as the answer.

Team 1 shakes hand with 15 people and hence 3x15 =45
Team 2 has already shaked hands with Team 1.
Team 2 shakes hand with 12 people and hence 3x12 =36
and so on gives,

3x15+3x12+3x9+3x6+3x3=45+36+27+18+9=135.
is there a shortcut to this problem besides this method?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 148
Joined: Wed Dec 10, 2008 5:13 pm
Location: SF, CA
Thanked: 12 times

by lilu » Sun Mar 22, 2009 3:53 pm
Each person has to shake hands with 15 people (18 total-2 from his team -1 himself=15)
And there are 18 people *15 handshakes = 270,
now we need 2 people to make a handshake, so we need to divide 270 by 2-->135, otherwise we'd be counting each combination two times
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1