Search found 15 matches
- by ladhanivishal
Mon Aug 03, 2009 11:01 pm- Forum: Problem Solving
- Topic: Probability problem
- Replies: 8
- Views: 1868
I am getting 665. Why are you subtracting 6 in the second case? It should be 3 according to me.Please explain.ThanksOA:
4W 2M == 5C4.(8C2-1) = 5.(27) = 135
3W 3M == 5C3.(8C3-6) = 10.50 = 500
total 635
- by ladhanivishal
Mon Jul 13, 2009 3:16 am- Forum: Problem Solving
- Topic: Difficult Math Problem #63 - Combinations
- Replies: 12
- Views: 3682
yeah doesnt look like "pairs" is correct.. secondly there is not arrangement or order.. it only says "how to form" so the answer should be A
Also if there was an arrangement.. it should have been multiplied by 8! and not 4!... can anybody throw some more light here..
- by ladhanivishal
Wed Jul 08, 2009 12:35 am- Forum: Problem Solving
- Topic: Doubt with two combination questions:
- Replies: 4
- Views: 1605
Permutation Combination Problem 2
At a dinner party, 5 people are to be seated around a circular table. Two seating arrangements are considered different only when the positions of the people are different relative to each other. What is the total nummber of different possible seating arrangements for the group? (A) 5 (B) 10 (C) 24 ...
- by ladhanivishal
Tue Jul 07, 2009 2:32 am- Forum: Problem Solving
- Topic: Permutation Combination Problem 2
- Replies: 1
- Views: 1257
- by ladhanivishal
Tue Jul 07, 2009 2:31 am- Forum: Problem Solving
- Topic: Permutation Combination Problem
- Replies: 13
- Views: 2019
In the first case : "How many 17-letter words can be formed using the 26 lower-case letters of the alphabet if:Each word contains exactly 4 vowels, with repetition of letters not allowed " The Answer is 5C4*21C13*17! whereas in the second case : "How many 17-letter words can be formed...
- by ladhanivishal
Mon Jul 06, 2009 11:50 pm- Forum: Problem Solving
- Topic: Permutation Combination Problem
- Replies: 13
- Views: 2019
Also what will be the answer for -
How many 17-letter words can be formed using the 26 lower-case letters of the alphabet if:Repetition of letters is not allowed?
- by ladhanivishal
Mon Jul 06, 2009 10:06 pm- Forum: Problem Solving
- Topic: Permutation Combination Problem
- Replies: 13
- Views: 2019
- by ladhanivishal
Mon Jul 06, 2009 9:47 pm- Forum: Problem Solving
- Topic: Permutation Combination Problem
- Replies: 13
- Views: 2019
Permutation Combination Problem
How many 17-letter words can be formed using the 26 lower-case letters of the alphabet if:Each word contains exactly 4 vowels, with repetition of letters not allowed
My Answer :
5P4*21P13
OA : 5C4*21C13*17
Can somebody please explain?
- by ladhanivishal
Mon Jul 06, 2009 9:06 pm- Forum: Problem Solving
- Topic: Permutation Combination Problem
- Replies: 13
- Views: 2019
- by ladhanivishal
Mon Jul 06, 2009 1:30 am- Forum: Data Sufficiency
- Topic: DS question.. x=3y
- Replies: 5
- Views: 1821
- by ladhanivishal
Mon Jul 06, 2009 12:11 am- Forum: Problem Solving
- Topic: Permutation percentage combination
- Replies: 4
- Views: 3652
- by ladhanivishal
Sun Jul 05, 2009 11:50 pm- Forum: Data Sufficiency
- Topic: DS question.. x=3y
- Replies: 5
- Views: 1821
DS question.. x=3y
if x=3y, is x^2>y^2?
i)x+y<x*y
ii)x^2=9*y^2
Answer is A
Please can anybody explain this?
- by ladhanivishal
Sun Jul 05, 2009 9:18 pm- Forum: Data Sufficiency
- Topic: DS question.. x=3y
- Replies: 5
- Views: 1821
AWESOME .. Should be on the front board
This thread is awesome.. i guess it has not been updated thou.. it wud be great if u cud update ur second post
- by ladhanivishal
Thu Jun 25, 2009 5:51 am- Forum: Sentence Correction
- Topic: Answers and discussion links to 1000 SC problems
- Replies: 24
- Views: 49344
Hi Guys... I have just started my preps on GMAT and would love to be a part of this group.. Please let me know whens the next meet.. whom to talk? email?
- by ladhanivishal
Wed Jun 10, 2009 9:57 pm- Forum: Let's Meet Up
- Topic: Anyone from Bangalore
- Replies: 81
- Views: 26022