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 →

Three integers are at random chosen between 0 and 9 inclusive. What is the probability that each number is different?

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 2647
Joined: Sun Oct 29, 2017 2:08 pmFollowed by: 2 members
by AAPL » Mon Dec 28, 2020 10:54 am

Timer

00:00

Answers

A

B

C

D

E

Stats

Difficulty—

Manhattan Prep

Three integers are at random chosen between 0 and 9 inclusive. What is the probability that each number is different?

A. 18/25
B. 4/5
C. 81/100
D. 9/10
E. 1

OA A
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Legendary Member
Posts: 2214
Joined: Fri Mar 02, 2018 2:22 pmFollowed by: 5 members

Re: Three integers are at random chosen between 0 and 9 inclusive. What is the probability that each number is different

by deloitte247 » Sat Jan 02, 2021 11:32 am
What is the probability that each number of the 3 randomly selected integers is different?
0-9 inclusive, there are 10 different numbers within this range
After selecting the first number, there will be 9 numbers remaining. The probability of selecting a different number is 9/10
After selecting the second number, there will be 8 numbers left, the probability of selecting a different number is 8/10
The final probability for selecting 3 random integers that are different = 9/10 * 8/10
= 9/5 * 4/10 => 9/5 * 2/5
=18/25

ANSWER = A
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1