GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 17 Jul 2018, 16:27

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

What is the probability of rolling three fair dice and having none of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47037
What is the probability of rolling three fair dice and having none of [#permalink]

Show Tags

New post 06 Dec 2016, 11:09
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

79% (00:49) correct 21% (01:26) wrong based on 103 sessions

HideShow timer Statistics

Board of Directors
User avatar
G
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 3639
Location: India
GPA: 3.5
WE: Business Development (Commercial Banking)
GMAT ToolKit User Premium Member
Re: What is the probability of rolling three fair dice and having none of [#permalink]

Show Tags

New post 07 Dec 2016, 11:14
1
Bunuel wrote:
What is the probability of rolling three fair dice and having none of the three dice show a prime number?

A. 5/8
B. 1/8
C. 1/36
D. 1/108
E. 1/216


There are 3 non prime numbers in a dice - { 1, 4, 6 }
Probability of getting a Non Prime number in a single throw is = \(\frac{3}{6} = \frac{1}{2}\)

So, The probability of getting none of the three dice show a prime number is \((\frac{1}{2})^3\)

Hence, answer will be (B) \(\frac{1}{8}\)
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Manager
Manager
avatar
B
Joined: 18 Jun 2017
Posts: 60
Re: What is the probability of rolling three fair dice and having none of [#permalink]

Show Tags

New post 03 Aug 2017, 03:18
Probability of non prime nos to appear in 3 rolls
1-P(3 prime nos appear)=1-1/2*1/2*1/2=7/8.
So in that case probability of prime nos not to appear in 3 rolls
=1-7/8=1/8
Option B.
Re: What is the probability of rolling three fair dice and having none of   [#permalink] 03 Aug 2017, 03:18
Display posts from previous: Sort by

What is the probability of rolling three fair dice and having none of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.