Search found 131 matches
- by mariah
Mon Oct 03, 2011 3:11 am- Forum: Problem Solving
- Topic: combination
- Replies: 10
- Views: 2026
GmatguruNY, Hi A professor assigns three projects to seven students. The students will be divided two three groups, which has three, two, two students, respectively. How many ways are possible? as you nicely explained answer for this question would be 210, - 7c3*4c2*2c2=210 but , I can’t get quest...
- by mariah
Sun Oct 02, 2011 9:46 am- Forum: Problem Solving
- Topic: combination
- Replies: 10
- Views: 2026
combination
In how many ways are possible to divide 7 students in 3 groups. if two groups got 2 people and another one 3 !
- by mariah
Sat Oct 01, 2011 2:00 am- Forum: Problem Solving
- Topic: combination
- Replies: 10
- Views: 2026
- by mariah
Thu Jul 07, 2011 5:56 pm- Forum: Problem Solving
- Topic: tough combination
- Replies: 8
- Views: 3650
tough combination
how many ways can a selection be done of 5 letters out of 5 A's, 4B'S, 3C'S, 2D'S and 1 E.
a) 60
b) 75
c) 71
d) 121
e) 221
[spoiler]oa c[/spoiler]
- by mariah
Thu Jul 07, 2011 12:27 pm- Forum: Problem Solving
- Topic: tough combination
- Replies: 8
- Views: 3650
sequence
n is an integer greater than or equal to 0. The sequence tn for n > 0 is defined as tn = tn–1 + n. Given that t0 = 3, is tn even? (1) n + 1 is divisible by 3 (2) n – 1 is divisible by 4 (A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient. (B) Statement (2) alone is s...
- by mariah
Sun May 08, 2011 10:48 am- Forum: Data Sufficiency
- Topic: sequence
- Replies: 7
- Views: 2409
average
If the average (arithmetic mean) annual income for a group of people is x and the annual income of one of the members of the group, Joe, increases by 25%, how much does the average income of the whole group increase? (A) There are 8 people in the group. (B) The total initial income of the group is 9...
- by mariah
Tue Apr 26, 2011 12:46 pm- Forum: Data Sufficiency
- Topic: average
- Replies: 2
- Views: 1085
- by mariah
Wed Apr 20, 2011 3:31 pm- Forum: Critical Reasoning
- Topic: museum
- Replies: 9
- Views: 2504
whether prime number p ia a factor of n!
is the prime number p a factor of n!, where n is a nonnegative integer.
1. Prime number p divides n! + (n+2)!.
2. The prime number p divides (n+2)!/n!.
[spoiler]oa c[/spoiler]
- by mariah
Wed Apr 20, 2011 3:27 pm- Forum: Data Sufficiency
- Topic: whether prime number p ia a factor of n!
- Replies: 1
- Views: 970
- by mariah
Mon Apr 11, 2011 6:38 am- Forum: Critical Reasoning
- Topic: museum
- Replies: 9
- Views: 2504
- by mariah
Mon Apr 11, 2011 6:32 am- Forum: Critical Reasoning
- Topic: museum
- Replies: 9
- Views: 2504
museum
Museum visitor: The national government has mandated a 5 percent increase in the minimum wage paid to all workers. This mandate will adversely affect the museum-going public. The museum’s revenue does not currently exceed its expenses, and since the mandate will significantly increase the museumâ€...
- by mariah
Mon Apr 11, 2011 6:30 am- Forum: Critical Reasoning
- Topic: museum
- Replies: 9
- Views: 2504
mechanic system
A mechanic system consists of a large gear and a little gear. The rating life
of the gear is 6000,000 rounds. What is the life of the whole system?
1). The ratio between two radius is Â…2/5
2). It cost 2 minutes for the little gear to round one circle.
dont have oa
- by mariah
Fri Apr 01, 2011 9:22 am- Forum: Data Sufficiency
- Topic: mechanic system
- Replies: 2
- Views: 1078
- by mariah
Fri Apr 01, 2011 6:34 am- Forum: Problem Solving
- Topic: combination
- Replies: 8
- Views: 1974
area on encircled region
What is the area of the region encircled by y<=3 X>=2, and Y>=x-6?
pls explain ..
- by mariah
Fri Apr 01, 2011 6:21 am- Forum: Data Sufficiency
- Topic: area on encircled region
- Replies: 4
- Views: 1072