Last visit was: 25 Nov 2024, 00:22 It is currently 25 Nov 2024, 00:22

Close

GRE Prep 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 GRE 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
avatar
Intern
Intern
Joined: 14 Jun 2017
Posts: 11
Own Kudos [?]: 11 [2]
Given Kudos: 0
Most Helpful Expert Reply
avatar
Supreme Moderator
Joined: 01 Nov 2017
Posts: 371
Own Kudos [?]: 470 [6]
Given Kudos: 0
Send PM
General Discussion
Verbal Expert
Joined: 18 Apr 2015
Posts: 30021
Own Kudos [?]: 36388 [0]
Given Kudos: 25928
Send PM
avatar
Intern
Intern
Joined: 06 Jul 2018
Posts: 32
Own Kudos [?]: 9 [0]
Given Kudos: 0
Send PM
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
I found 2/3 is the answer. is it correct ?
avatar
Manager
Manager
Joined: 22 Jul 2018
Posts: 80
Own Kudos [?]: 105 [0]
Given Kudos: 0
Send PM
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
Is it 2/3?
avatar
Manager
Manager
Joined: 22 Feb 2018
Posts: 163
Own Kudos [?]: 214 [0]
Given Kudos: 0
Send PM
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
Faces of the six-sided dice: 1,2,3,4,5 and 6
The total possible ways: 6*6 = 36 (1,1)….(6,6)
The probability that the result is either a 3 and a 4 or a 5 and a prime number
either a 3 and a 4: (3,4) | (4,3)
5 and a prime number: (5,2), (5,3), (5,5), (2,5), (3,5)
So all the possible results with the conditions are 7.

The probability that the result is either a 3 and a 4 or a 5 and a prime number is :
7/ 36
Intern
Intern
Joined: 22 Sep 2021
Posts: 47
Own Kudos [?]: 7 [0]
Given Kudos: 19
Send PM
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
it is rolled 2 times, I think that. So it would be 7/36
avatar
Intern
Intern
Joined: 19 Aug 2020
Posts: 13
Own Kudos [?]: 5 [0]
Given Kudos: 8
Send PM
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
It is 7/36
Retired Moderator
Joined: 19 Nov 2020
Posts: 326
Own Kudos [?]: 373 [0]
Given Kudos: 64
GRE 1: Q160 V152
Send PM
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
P(A=3&4)=2/6*1/6=1/18

P(B=5&prime number)=5/36

P(A or B) = P(A) + P(B) - P(A&B)

It's 1/18+5/36-5/(18*36)=(36+5*18-5)/(18*36)=121/(18*12)


This excludes or both set. When or both set is included, the answer is 60%
MateusLima30 wrote:
Hi guys! This question appeared on the Cracking the GRE 2019 premium version from Princeton Review. The book has a graphical explanation that did not convince me. Coud anyone provide me an insight on this? 

When a pair of six-sided dice, each with faces numbered 1 to 6, is rolled once, what is the probability that the result is either a 3 and a 4 or a 5 and a prime number? 


Posted from my mobile device
Prep Club for GRE Bot
Re: When a pair of six-sided dice, each with faces numbered 1 to 6, [#permalink]
Moderators:
GRE Instructor
84 posts
GRE Forum Moderator
37 posts
Moderator
1111 posts
GRE Instructor
234 posts

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