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 →

basic combination

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 11
Joined: Thu Jul 15, 2010 12:08 pm
by joconnor » Thu Sep 22, 2011 7:33 am
Two members of a club are to be selected to represent the club at a national mtg. If there are 190 different possible selections of the 2 members, how many members does the club have?

a) 20
b) 27
c) 40
d) 57
e) 95
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 158
Joined: Sat Sep 03, 2011 10:31 amFollowed by: 2 members
Thanked: 29 times

by gmatclubmember » Thu Sep 22, 2011 7:53 am
joconnor wrote:Two members of a club are to be selected to represent the club at a national mtg. If there are 190 different possible selections of the 2 members, how many members does the club have?

a) 20
b) 27
c) 40
d) 57
e) 95
If there are n member in the club, then the combinations possible to choose 2 members would be nC2.
n(n-1)/2 = 190 = n(n-1)=19*20 =>n=20.

A is the OA.

Cheers
Ami/-
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1