Search found 266 matches
- by pkw209
Thu May 06, 2010 3:56 pm- Forum: Data Sufficiency
- Topic: On the number line shown, is zero halfway
- Replies: 7
- Views: 12155
- by pkw209
Tue May 04, 2010 3:47 pm- Forum: Sentence Correction
- Topic: Based on accounts of various ancient writers...
- Replies: 18
- Views: 17955
The official answer is A . This problem is from a MGMAT CAT. Explanation is below. (1) SUFFICIENT: This tells us that B started traveling 1 hour after Train A started traveling. From the question we know that Train A had been traveling for 2 hours when the trains passed each other. Thus, train B, wh...
- by pkw209
Mon May 03, 2010 4:40 pm- Forum: Data Sufficiency
- Topic: Trains A and B - MGMAT
- Replies: 6
- Views: 3786
Thank you, Stuart.
1) Is it safe to assume that if more than 50% of the terms within a set are BELOW the mean, then the mean is GREATER than the median?
2) Is it safe to assume that if more than 50% of the terms within a set are ABOVE the mean, then the mean is LESS than the median?
- by pkw209
Mon May 03, 2010 4:32 pm- Forum: Data Sufficiency
- Topic: The city x that never sleeps
- Replies: 2
- Views: 2288
Because the jellybeans are randomly assigned to each of the 3 kinds of boxes, the probability that you have any particular one kind of box is 1/3. Ah! Thank you! This problem was driving me crazy. I got up to the 2/3, 1/2, 1/3 respectively for 2, 3, or 4 different flavors and then added them all up...
- by pkw209
Mon May 03, 2010 4:17 pm- Forum: Problem Solving
- Topic: Jellybean Probability
- Replies: 30
- Views: 20113
- by pkw209
Mon May 03, 2010 4:05 pm- Forum: Data Sufficiency
- Topic: Trains A and B - MGMAT
- Replies: 6
- Views: 3786
Average Salary
Last year the average salary of the 10 employees of company x was $42,800. What is the average salary of the same 10 employees this year? a) For 8 of the 10 employees, this year's salary is 15 percent greater than last year's salary. b) For 2 of the 10 employees, this year's salary is the same as la...
- by pkw209
Mon May 03, 2010 3:24 pm- Forum: Data Sufficiency
- Topic: Average Salary
- Replies: 1
- Views: 1095
The city x that never sleeps
In city x last April, was the average daily high temperature greater than the median daily high temperature? a) In city x last April, the sum of the 30 daily high temperatures was 2,160 degrees. b) In city x last April, 60 percent of the daily high temperatures were less than the average daily high ...
- by pkw209
Mon May 03, 2010 3:20 pm- Forum: Data Sufficiency
- Topic: The city x that never sleeps
- Replies: 2
- Views: 2288
Standard deviation of a set
Is the standard deviation of the set of measurements x1, x2, x3....x20 less than 3?
A) The variance for the set of measurements is 4.
B) For each measurement, the difference between the mean and that measurement is 2.
- by pkw209
Mon May 03, 2010 2:13 pm- Forum: Data Sufficiency
- Topic: Standard deviation of a set
- Replies: 5
- Views: 5942
Trains A and B - MGMAT
Trains A and B travel at the same constant rate in opposite directions along the same route between Town G and Town H. If, after traveling for 2 hours, Train A passes Train B, how long does it take Train B to travel the entire distance between Town G and Town H? (1) Train B started traveling between...
- by pkw209
Fri Apr 30, 2010 12:53 pm- Forum: Data Sufficiency
- Topic: Trains A and B - MGMAT
- Replies: 6
- Views: 3786
Bag of coins
A bag contains 3 gold coins and 7 silver coins. The bag contains nothing else. If 3 coins are selected at random and without replacement from the bag, what is the probability that exactly 2 of the coins are silver?
A) 7/40
B) 7/24
C) 3/10
D) 21/40
E) 2/3
- by pkw209
Fri Apr 30, 2010 12:39 pm- Forum: Problem Solving
- Topic: Bag of coins
- Replies: 3
- Views: 5583
Opera Singers
A promoter is organizing an opera concert. Ten singers are available for the program: 3 sopranos, 3 mezzos, 2 tenors and 2 baritones. If the promoter intends every segment to be a duet by performers with different vocal ranges, how many pairings of performers are possible? A) 6 B) 10 C) 24 D) 36 E) 37
- by pkw209
Fri Apr 30, 2010 12:33 pm- Forum: Problem Solving
- Topic: Opera Singers
- Replies: 1
- Views: 2743
Painting Arrangements
A certain gallery is hanging a series of 7 paintings. All the paintings will be exhibited in a row along a single wall. Exactly 2 of the paintings are on panel, the remainder are on canvas. In how many ways can the paintings be exhibited if the works on panel must be the second and sixth in the row?...
- by pkw209
Fri Apr 30, 2010 12:22 pm- Forum: Problem Solving
- Topic: Painting Arrangements
- Replies: 2
- Views: 2102
Jellybean Probability
A certain company sells jellybeans in the following six flavors only: banana, chocolate, grape, lemon, peach and strawberry. If the jellybeans are sorted randomly into boxes containing exactly 2, 3 or 4 different flavors only, what is the probability that any given box contains grape jellybeans? a) ...
- by pkw209
Fri Apr 30, 2010 12:14 pm- Forum: Problem Solving
- Topic: Jellybean Probability
- Replies: 30
- Views: 20113
This seriously needs to be clarified by an expert, if possible. BTG FLASHCARDS and Kaplan say that "none of" is always singular even though it sounds like it should be plural, while MGMAT says it depends on the "of" What is the correct answer? does anyone in this world know? I cr...
- by pkw209
Thu Apr 29, 2010 1:19 pm- Forum: Sentence Correction
- Topic: SANAM Pronouns
- Replies: 10
- Views: 19734