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 350,000 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:

COMBINATION and PROBABILITY - references. If you have [#permalink]
01 Dec 2007, 08:53

58

This post received KUDOS

Expert's post

120

This post was BOOKMARKED

COMBINATION and PROBABILITY - references.

If you have problems with combination and probability you can use this reference page to find information quickly. I guess my small contribution to the GMATclub community will help other people to crack 800 score.

#1. Com-prob problems always have a few different solutions. Try to solve the problems in many ways, and that will give you self-reliance.

#2. Use enumeration of possibilities for the problems with complex restrictions.

#3. "How can I apply here \(C^n_k\) or \(P^n_k\)?" - is a wrong question. Always understand what the formulas mean.

LINKS

easy - 56860 - 6 boys and 4 girls easy - 56779 - 10 red, 5 blue, 12 yellow pills. easy - 56728 - 10 marbles contains 3 red marbles and 7 blue marbles easy - 56446 - 4 people and integers between 1 and 4 easy - 56419 - an iced tea easy - 55984 - a contest consists of n questions easy - 55939 - 15 chess players easy - 55734 - 3 candidates for a university easy - 55689 - a pack of candy (2) easy - 55644 - a five-question true/false section easy - 55515 - a pack of candy easy - 54481 - red and blue chips medium - 58914 - a junior class has 1,000 students and a senior class has 800 students medium - 58887 - that include Michael also include Anthony medium - 58742 - 2 couples and 1person are seated in a row medium - 58675 - n(n + 1)(n + 2) is divisible by 8 medium - 58670 - Probability of Winning medium - 58640 - 4 people out of the 12 meried couples medium - 58629 - two ineger sets medium - 58609 - 9 people in the room medium - 58529 - 2 objects collide on a cube medium - 58521 - DS: heads than tails medium - 58476 - Marco and Maria toss a coin three times medium - 58360 - two ineger sets (2) medium - 58357 - coin is flipped 5 times medium - 58352 - 11 women and 9 men in a certain club medium - 58350 - DS: 10 light bulbs medium - 58233 - SQUARE medium - 58187 - A certain company assigns employees to offices medium - 58160 - 3 people are to be selected out of 8 people medium - 58095 - Bob are among the 5 participants in a cycling race medium - 58016 - 3 people is to be selected from 5 married couples medium - 57997 - junior class has 1000 students and senior class has 800 students medium - 57981 - positions at univeristy medium - 57980 - women and men of 10 employees medium - 57957 - rain on any given day in City X medium - 57916 - a and b from a set of 4 consecutive integers medium - 57882 - Anthony and Michael sit on the six-member board of directors for company X medium - 57799 - A fair die is rolled once and a fair coin is flipped once medium - 57695 - 3 dwarves and 3 Elves medium - 57645 - A contest will consist of n questions medium - 57629 - coin medium - 57615 - A jar contains b black, w white, and r red marbles medium - 57601 - GMPJBC medium - 57577 - 5 people are to be seated around a circular table medium - 57554 - Coach Miller medium - 57332 - A coach will make 3 substitutions medium - 56826 - 7 people and friendship medium - 56814 - coin with sides marked heads and tails medium - 56814 - tails side up more than five times medium - 56812 - a election in Burghtown. medium - 56709 - A set consist of 2n-1 element medium - 56705 - 25 lines medium - 56681 - 2 numbers from 1,2,3,4,5 medium - 56590 - 2 red and 3 blue marbles medium - 56586 - different colors from 6 flowers. medium - 56585 - 4 particular flowers of 8 different flowers medium - 56572 - five-digit numbers medium - 56557 - a committee of 4 distinct pairs of brothers and sisters medium - 56556 - three letters taken from letters (a,a,b,b,c,c,d) medium - 56530 - 12 playing cards medium - 56530 - 4 cards of 12 cards medium - 56446 - 4 people choose an integer between 1 and 4, inclusive. medium - 56445 - 5 of 7 models medium - 56443 - Two couples and one single person in a row of five chairs. medium - 56349 - 3 girls and 4 boys in a row medium - 56327 - shirts, shoes, pants medium - 56122 - Six mobsters: Frankie behind Joey medium - 56037 - a team from men and women medium - 55870 - 3 cars medium - 55823 - 4 senior partners and 6 junior partners medium - 55811 - 5 women are in a race medium - 55803 - a committee from 4 married couples medium - 55764 - 100 numbered cubes medium - 55743 - A and B stocks medium - 55694 - Two fair dices medium - 55673 - 3 different marbles medium - 55644 - GMATT answers medium - 55617 - 4 guys, 2 girls and 14 dogs. medium - 55509 - A committee of 3 people from 4 couples medium - 55504 - Ways from A to D medium - 55472 - 4 pairs of brothers and sisters medium - 55427 - 4 books fom 2 paperback and 6 hardback books medium - 55421 - the probability that n(n+1)(n+2) will be divisible by 8 medium - 55413 - 3-digit integer medium - 55410 - A committee from 5 military officers and 9 civilians. medium - 55383 - 4 physics, 2 math and 3 chemistry books medium - 55372 - My name is AJEET medium - 55369 - 8 friends want to play doubles tennis medium - 55366 - The most expensive two books medium - 55340 - trhee letters from seven different postboxes medium - 55311 - 6 cards medium - 55253 - Rich has 3 green, 2 red and 3 blue balls in a bag medium - 55141 - A bowl contains white and black balls. medium - 55071 - 10 bottles of alcohol medium - 55054 - 3 sniper's shoots medium - 54794 - a fantasy football game medium - 54650 - 6 cards medium - 54332 - Bob and Jen in a race medium - 53774 - The choir consists of 5 boys and 6 girls medium - 50488 - 5 digit numbers medium - 45753 - a committe of 3 of 6 people medium - 41464 - deck contains 2 blue, 2 red, 2 yellow, and 2 green cards medium - 19685 - 5 digit numbers formed using the digits 0, 1, 2, 3, 4, 5 medium - 15366 - Mary and Joe throw three dice each medium - 59065 - A 4-letter code hard - 58616 - PS Standard deviation + probabilities hard - 57713 - the total number of permutations of n different things hard - 57447 - A fair coin is tossed 10 times hard - 57169 - DS: How many subordinates does Marcia Have

7-t-44300.html - good collection of Math links. \(\to\)http://gmatclub.com/forum/7-t-56486.html - Combination-Permutation-Probability quant problems: my list with links 7-t-57156.html - Combination-Permutation-Probability quant problems: list of 55 different question with explanation [Amardeep Sharma]

Medium - 79490 - How many four-digit odd numbers do not use any digit more than once Meidum - 79312 - A jar contains only x black balls and y white balls

Last edited by bb on 09 Jun 2009, 17:12, edited 4 times in total.

Re: COMBINATION and PROBABILITY - references. [#permalink]
22 Jan 2008, 15:34

1

This post received KUDOS

Walker - awesome; simply awesome. Are you Walker as in Walker: Texas Ranger. Because if you are, a Chuck Norris reference comes to mind: "When Chuck Norris falls into water, he does not get wet. The water gets Chuck Norris."

Hey, Last week I started a few new things in my life. That includes shifting from daily targets to weekly targets, 45 minutes of exercise including 15 minutes of yoga, making...

This week went in reviewing all the topics that I have covered in my previous study session. I reviewed all the notes that I have made and started reviewing the Quant...

I started running as a cross country team member since highshcool and what’s really awesome about running is that...you never get bored of it! I participated in...