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 →

What is the probability of selecting a white ball from a jar at random?

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 2547
Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members
by BTGmoderatorLU » Thu Jun 01, 2023 5:08 pm

Timer

00:00

Answers

A

B

C

D

E

Stats

Difficulty—

Source: Veritas Prep

What is the probability of selecting a white ball from a jar at random?

1. There are twice as many white balls as balls of all other colors combined

2. There are \(30\) more white balls than balls of all other colors combined

The OA is A
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
Junior | Next Rank: 30 Posts
Posts: 16
Joined: Wed May 24, 2023 7:40 am

Re: What is the probability of selecting a white ball from a jar at random?

by GMATJourneyman » Sat Jun 03, 2023 1:10 pm
BTGmoderatorLU wrote: ↑
Thu Jun 01, 2023 5:08 pm
 Source: Veritas Prep

What is the probability of selecting a white ball from a jar at random?

1. There are twice as many white balls as balls of all other colors combined

2. There are \(30\) more white balls than balls of all other colors combined

The OA is A
Statement 1 indicates that the number of white balls is double the number of all other balls combined. In probability terms, you're two times more likely to select a white ball than any other color. This makes the probability 2/3, which is sufficient to answer the question.

However, statement 2 only tells us that there are 4 more white balls than all other colors combined, but it doesn't give us the total number of balls. Therefore, we can't determine the exact probability, making this statement insufficient.

So, the correct answer is indeed A - the first statement is sufficient, but the second isn't.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1