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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

07 Oct 2009, 18:48

1

This post received KUDOS

1

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

79% (02:09) correct
21% (02:14) wrong based on 133 sessions

HideShow timer Statistics

In a jar there are balls in different colors: blue, red, green and yellow. The probability of drawing a blue ball is 1/8. The probability of drawing a red ball is 1/5. The probability of drawing a green ball is 1/10. If a jar cannot contain more than 50 balls, how many yellow balls are in the Jar?

Re: In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

07 Oct 2009, 19:30

The answer is A: 23.

First step: determine how many balls are in the jar. Essentially, since the number of balls can't be a decimal number, it must be a multiple of 5, 8 and 10. The LCM of those three numbers is 40.

The probability of drawing a blue ball is 1/8. -> 5 blue balls The probability of drawing a red ball is 1/5. -> 8 red balls The probability of drawing a green ball is 1/10. -> 4 green balls

Re: In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

07 Oct 2009, 19:33

mohana wrote:

In a jar there are balls in different colors: blue, red, green and yellow. The probability of drawing a blue ball is 1/8. The probability of drawing a red ball is 1/5. The probability of drawing a green ball is 1/10. If a jar cannot contain more than 50 balls, how many yellow balls are in the Jar?

a) 23. b) 20. c) 24. d) 17. e) 25.

The probability of drawing a blue ball is 1/8 = 5/40 The probability of drawing a red ball is 1/5 = 8/40 The probability of drawing a green ball is 1/10 = 4/40 Yellow balls = 40-(5+8+4) = 23

Re: In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

08 Oct 2009, 03:36

LCM of (8,5,10) < 50 ....i.e. 40 balls

The probability of drawing a blue ball is Pb = 1/8 : B/40 thus B = 5 The probability of drawing a red ball is Pr = 1/5 : R/40 thus R = 8 The probability of drawing a green ball is Pg = 1/10 : G/40 thus G = 4

Thus Yellow balls = 40-(5+8+4) = 23....OA A _________________

Bhushan S. If you like my post....Consider it for Kudos

Re: In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

03 May 2011, 09:50

total number of balls will have factors 8,5 and 10.Hence the number will be multiple of 40. total balls = 40 yellow ball = 40- (5+8+4) = 23
_________________

Visit -- http://www.sustainable-sphere.com/ Promote Green Business,Sustainable Living and Green Earth !!

Re: In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

12 Sep 2014, 13:21

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: In a jar there are balls in different colors: blue, red, green and yel [#permalink]

Show Tags

19 Sep 2014, 23:14

mohana wrote:

In a jar there are balls in different colors: blue, red, green and yellow. The probability of drawing a blue ball is 1/8. The probability of drawing a red ball is 1/5. The probability of drawing a green ball is 1/10. If a jar cannot contain more than 50 balls, how many yellow balls are in the Jar?

A. 23 B. 20 C. 24 D. 17 E. 25

# Blue Balls = Total Balls / 8, similarly #Red Balls = TB/5; #Green Balls = TB/10

Hey, guys, So, I’ve decided to run a contest in hopes of getting the word about the site out to as many applicants as possible this application season...

Whether you’re an entrepreneur, aspiring business leader, or you just think that you may want to learn more about business, the thought of getting your Masters in Business Administration...

Whether you’re an entrepreneur, aspiring business leader, or you just think that you may want to learn more about business, the thought of getting your Masters in Business Administration...