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 →

urgent help

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
Junior | Next Rank: 30 Posts
Posts: 22
Joined: Wed Nov 28, 2007 10:51 am
Thanked: 3 times

by sirikesav » Sun Dec 02, 2007 5:39 am
If the terms of a sequence are t1,t2,t3,....,tn, what is the value of n?
1. the sum of the n terms is 3124
2. the average(arithmetic mean) of the n terms is 4

both together is required to answer the question
because
arthimatic mean = Sum of all the Number/total no odf number(n in this case)

so we as per the data in 1 & 2
arithmetic mean = 4
Sum of all the Number = 3124
hence n= 3124/4 = 781
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 460
Joined: Sun Mar 25, 2007 7:42 am
Thanked: 27 times

by samirpandeyit62 » Sun Dec 02, 2007 5:43 am
If the terms of a sequence are t1,t2,t3,....,tn, what is the value of n?

1. the sum of the n terms is 3124

nos of terms may vary depending upon how the terms of the sequence relate to ecah other, eg consecutive series, AP's etc & also the starting value of the sequence INSUFF

2. the average(arithmetic mean) of the n terms is 4

this is also similar to the above case, 4 can be the mean of many possible sequences INSUFF

COMBINE

sum =3124, mean =4

mean =sum /n

n= 3124/4

C
Regards
Samir
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 42
Joined: Tue Nov 06, 2007 10:39 am

by lawalx » Sun Dec 02, 2007 2:56 pm
tnx guys i rily appreciate it
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1