Search found 518 matches
Mitch, This statement in question seems very confusing. "Number of people who graduated from college in 1997 who did not both receive a degree in the applied sciences and graduate from a school in one of six northeastern states" Whether it says number of people who both didn't received app...
- by nikhilgmat31
Thu Oct 08, 2015 4:01 am- Forum: Problem Solving
- Topic: Overlapping sets question
- Replies: 13
- Views: 8637
At first place, we think it as both combines to 15
and makes equation 4x + 5y = 300 which is absolutely wrong.
- by nikhilgmat31
Thu Oct 08, 2015 2:44 am- Forum: Problem Solving
- Topic: Of the applicants passes a certain test, 15
- Replies: 16
- Views: 9827
Question is pretty simple but including 2/3rd of its air-conditioned rooms statement is little complex.
2/3 of rooms rented or 2/3 of AC rooms.
- by nikhilgmat31
Thu Oct 08, 2015 2:13 am- Forum: Problem Solving
- Topic: motel
- Replies: 4
- Views: 8138
Hi Brent,
Counting the number of way for 5 Men = 120 seems fine.
But Why can't we have a pattern of 4 women as M_M_M_M_M
where we will have 4 * 3 * 2 * 1 = 24 options for ladies.
total of 120* 24 = 2880 options.
Also can't we solve this question using other formula as - 9!/(5!*4!) = 126 .....
- by nikhilgmat31
Thu Oct 08, 2015 1:35 am- Forum: Problem Solving
- Topic: no two ladies sit together?
- Replies: 9
- Views: 35727
- by nikhilgmat31
Thu Oct 08, 2015 1:24 am- Forum: Problem Solving
- Topic: Permutation and combination
- Replies: 8
- Views: 14012
- by nikhilgmat31
Thu Oct 08, 2015 12:23 am- Forum: Problem Solving
- Topic: combinatorics problem
- Replies: 15
- Views: 9861
Thanks Rich, I got you, basically picking the RED car at the first place or the last place doesn't matter so it is combination of cars. I clearly remember nCr = n!/r!(n-r)! nPr = n!/r! But I am always confused if order of items matter then number of options of placement will be more or less. But now...
- by nikhilgmat31
Thu Oct 08, 2015 12:09 am- Forum: Problem Solving
- Topic: combinatorics problem
- Replies: 15
- Views: 9861
- by nikhilgmat31
Thu Oct 08, 2015 12:00 am- Forum: Problem Solving
- Topic: Doubt on Separator Method
- Replies: 14
- Views: 6439
- by nikhilgmat31
Wed Oct 07, 2015 9:04 pm- Forum: Problem Solving
- Topic: Simple one :)
- Replies: 10
- Views: 6523
Simple way to remember such question is number of way to arrange GGGRRR
is 6! / (3! * 3!) = 6 * 5 * 4 * 3! / 6 * 3! = 5*4 = 20
- by nikhilgmat31
Wed Oct 07, 2015 2:31 am- Forum: Problem Solving
- Topic: PS_Counting
- Replies: 8
- Views: 4431
I posted solutions here: http://www.beatthegmat.com/combinatorics-manhattan-gmat-cat-question-t89780.html http://www.beatthegmat.com/pls-clear-my-doubt-mgmat-cat-t85743.html this question statement itself asks for How many combinations. but everyone is counting permutations. I also counted till 192...
- by nikhilgmat31
Wed Oct 07, 2015 12:34 am- Forum: Problem Solving
- Topic: combinatorics problem
- Replies: 15
- Views: 9861
We can count it in simple way as 144 234 126 333 522 711 531 144 can arranged in 3!/2! = 3 ways 234 can arranged in 3! = 6 ways 126 can arranged in 3! = 6 ways 333 can arranged in 1! = 1 way 522 can arranged in 3!/2! = 3 ways 711 can arranged in 3!/2! = 3 ways 531 can arranged in 3! = 6 ways Total n...
- by nikhilgmat31
Wed Oct 07, 2015 12:20 am- Forum: Problem Solving
- Topic: inserting stick or seperator rule
- Replies: 4
- Views: 2645
A certain company assigns employees to offices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3 employees to 2 different offices? A. 4 B. 6 C. 7 D. 8 E. 9 Let X, Y and Z be the 3 employees. Let A a...
- by nikhilgmat31
Wed Oct 07, 2015 12:01 am- Forum: Problem Solving
- Topic: Doubt on Separator Method
- Replies: 14
- Views: 6439
A university cafeteria offers 4 flavors of pizza – pepperoni, chicken, Hawaiian and vegetarian. If a customer has an option to add extra cheese, mushrooms, or both to any kind of pizza, how many different pizza varieties are available? a) 12 b) 16 c) 8 d) 20 c) 10 Take the task of building a pizz...
- by nikhilgmat31
Tue Oct 06, 2015 11:33 pm- Forum: Problem Solving
- Topic: Simple one :)
- Replies: 10
- Views: 6523
Answer is A with total number of Guests as 70 NVNS= 15 VS/V. NS = 2/3 NV. S/NV. NS = 2 * VS/V.NS = 2 * 2/3 = 4/3 NV. S/NV.NS = 4/3 NV. S = 15 * 4/3 = 20 Total number of NV = NV.S + NV. NS = 20 + 15 = 35 Total number of Veg = 1/2 of Guests Veg = Non Veg Guests so total number of Guests = 35 * 2 = 70
- by nikhilgmat31
Mon Oct 05, 2015 1:04 am- Forum: Data Sufficiency
- Topic: 700 DS tough question .. really challenging !
- Replies: 53
- Views: 39409