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:

A certin deck of cards contains 2 blue cards,2 red cards,2 [#permalink]

Show Tags

06 Jan 2004, 11:53

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

** A certin deck of cards contains 2 blue cards,2 red cards,2 yellow cards and 2 green cards.If two cards are randomly drawn from the deck,what is the probability that they both will not be blue?

1) 15/28
2) 1/4
3) 9/16
4) 1/32
5) 1/16

** A bag of 10 marbles contains 3 red marbles and 7 blue marbles.If 2 marbles are selected at randon ,what is the probability that at least one marble is blue?

1) 21/50
2) 3/13
3) 47/50
4) 14/15
5) 1/5

Please provide an explantion.

Vivek.
_________________

"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

vivek, I see your point quite clearly. your answer is right since the question does specifically ask the probability of not getting two blue balls. since there's no answer choice for 27/28 I'm assuming that it's asking: "what's the probability that there are no blue balls chosen" where did you find this problem?

A certin deck of cards contains 2 blue cards,2 red cards,2 yellow cards and 2 green cards.If two cards are randomly drawn from the deck,what is the probability that they both will not be blue?

1) 15/28 2) 1/4 3) 9/16 4) 1/32 5) 1/16

6C2/8C2 = 15/28

Quote:

A bag of 10 marbles contains 3 red marbles and 7 blue marbles.If 2 marbles are selected at randon ,what is the probability that at least one marble is blue?

1) 21/50 2) 3/13 3) 47/50 4) 14/15 5) 1/5

Please provide an explantion.

1- 3C2 / 10C2 = 14/15

gmatclubot

Re: Probability Q's
[#permalink]
07 Jan 2004, 03:15