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

It is currently 24 Sep 2018, 08:32

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

Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12

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

Hide Tags

Senior Manager
Senior Manager
User avatar
G
Joined: 02 Mar 2017
Posts: 267
Location: India
Concentration: Finance, Marketing
Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12  [#permalink]

Show Tags

New post Updated on: 07 May 2017, 11:25
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

91% (00:30) correct 9% (00:22) wrong based on 92 sessions

HideShow timer Statistics

Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12 green, and 12 blue marbles. It contains no other marbles. What is the probability that a marble chosen at random will be either red or yellow?

A) 1/6
B) 1/3
C) 1/2
D) 2/3
E) 3/4

_________________

Kudos-----> If my post was Helpful


Originally posted by VyshakhR1995 on 24 Apr 2017, 00:17.
Last edited by Bunuel on 07 May 2017, 11:25, edited 1 time in total.
Renamed the topic and edited the question.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49429
Re: Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12  [#permalink]

Show Tags

New post 24 Apr 2017, 00:37
VyshakhR1995 wrote:
Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow,
12 green, and 12 blue marbles. It contains no other marbles.
What is the probability that a marble chosen at random will be
either red or yellow?

A)1/6
B)1/3
C)1/2
D)2/3
E)3/4


P(red or yellow) = (red + yellow)/(total) = (6 + 6)/(6 + 6 + 12 + 12) = 12/36 = 1/3.

Answer: B.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

BSchool Forum Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3138
Location: India
GPA: 3.12
Premium Member CAT Tests
Jeffrey has a bag of marbles that contains only 6 red, 6 yellow, 12 gr  [#permalink]

Show Tags

New post 16 May 2018, 12:09
QZ wrote:
Jeffrey has a bag of marbles that contains only 6 red, 6 yellow, 12 green, and 12 blue marbles. What is the probability that a marble at random from the bag is either red or yellow?

1. 1/6

2. 1/3

3. 1/2

4. 2/3

5. 3/4


There are a total of 6+6+12+12 or 36 marbles in Jeffrey's bag.

Therefore, the probability that the marble chosen is red or yellow is \(\frac{6+6}{36}\) or \(\frac{1}{3}\)(Option B)

_________________

You've got what it takes, but it will take everything you've got

Senior Manager
Senior Manager
User avatar
G
Joined: 31 May 2017
Posts: 325
GMAT ToolKit User CAT Tests
Re: Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12  [#permalink]

Show Tags

New post 21 May 2018, 22:04
Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12 green, and 12 blue marbles. It contains no other marbles. What is the probability that a marble chosen at random will be either red or yellow?

Probability of selecting red marbles = \(\frac{6}{36}\) = \(\frac{1}{6}\)

Probability of selecting Yellow marbles =\(\frac{6}{36}\) =\(\frac{1}{6}\)

Probability of selecting yellow or red marbles =\(\frac{1}{6}\) + \(\frac{1}{6}\) = \(\frac{1}{3}\)

Ans: B
_________________

Please give kudos if it helps

Resources
Ultimate GMAT Quantitative Megathread | ALL YOU NEED FOR QUANT ! ! ! | SC Blogs by Magoosh | How to improve your verbal score | Things i wish i could've done earlier | Ultimate Q51 Guide

VP
VP
User avatar
V
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1264
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Premium Member Reviews Badge CAT Tests
Re: Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12  [#permalink]

Show Tags

New post 01 Jun 2018, 23:51
VyshakhR1995 wrote:
Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12 green, and 12 blue marbles. It contains no other marbles. What is the probability that a marble chosen at random will be either red or yellow?

A) 1/6
B) 1/3
C) 1/2
D) 2/3
E) 3/4


Total marbles = 6 + 6 + 12 + 12 = 36

P (R) + P(Y) = 6/36 + 6/36 = 12/36

= 1/3

(B)

_________________

"Do not watch clock; Do what it does. KEEP GOING."

GMAT Club Bot
Re: Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12 &nbs [#permalink] 01 Jun 2018, 23:51
Display posts from previous: Sort by

Jeffrey has a bag of marbles. The bag contains 6 red, 6 yellow, 12

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

Events & Promotions

PREV
NEXT


Copyright

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®.