Search found 44 matches
No it does not offer any official explanations I think that it is still possible to eliminate A & B within 2 min, and if u r just so good at statistics may be able to pick C as the right choice, otherwise w may have to use our best judgment on this kind of questions I was thinking about skewness...
- by ch0719
Wed Dec 24, 2008 10:35 pm- Forum: Data Sufficiency
- Topic: mean, median and mode
- Replies: 14
- Views: 7847
considering the set {1,3,6,10,10,30} ave = mode = 10 but median is 8 I have tried several sets and this is one that made st2 insf. what I did was to assume a and b two integers lower than 10 in the set below: {a,b,6,10,10,30} and in this set, 10 is the mode since a does not equal to b now st2 told u...
- by ch0719
Wed Dec 24, 2008 10:10 pm- Forum: Data Sufficiency
- Topic: mean, median and mode
- Replies: 14
- Views: 7847
- by ch0719
Wed Dec 24, 2008 9:55 pm- Forum: Problem Solving
- Topic: committee
- Replies: 8
- Views: 8297
eight women in two rows...
the answer is D
can anyone explain how to get to the right answer in the minimum amount of time on this kind of question? thanks and happy holidays 
- by ch0719
Wed Dec 24, 2008 4:51 pm- Forum: Problem Solving
- Topic: eight women in two rows...
- Replies: 8
- Views: 1719
- by ch0719
Wed Dec 24, 2008 4:48 pm- Forum: Problem Solving
- Topic: triangle problem
- Replies: 2
- Views: 1271
mean, median and mode
The mode of a set of integers is x. What is the difference between the median of this set of integers and x? 1. The difference between any two integers in the set is less than 3 2. The average of the set of integers is x The answer is C It kind of make sense after I have tried out several sets of nu...
- by ch0719
Wed Dec 24, 2008 2:37 pm- Forum: Data Sufficiency
- Topic: mean, median and mode
- Replies: 14
- Views: 7847
committee
If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible?
20
40
50
80
120
Answer is 80
thanks
- by ch0719
Wed Dec 24, 2008 2:35 pm- Forum: Problem Solving
- Topic: committee
- Replies: 8
- Views: 8297
- by ch0719
Fri Dec 12, 2008 12:04 am- Forum: Data Sufficiency
- Topic: 2 height...
- Replies: 7
- Views: 16942
2 height...
For any positive integer x, the 2-height of x is defined to be the greatest non-negative integer n such that 2^n is a factor of x. If k and m are positive integers, is the 2-height of k greater than the 2-height of m?
1. k>m
2. k/m is an even integer
Answer is B
Thanks
- by ch0719
Thu Dec 11, 2008 7:57 pm- Forum: Data Sufficiency
- Topic: 2 height...
- Replies: 7
- Views: 16942
i see, this way is easier. i did the other way (calculated the area in inch and then try to convert to miles, but forgot that in this case it is miles^2)
just curious, is it possible to solve this problem by calculating the area in inch first and then make it into square miles
- by ch0719
Wed Dec 10, 2008 12:35 am- Forum: Problem Solving
- Topic: radious
- Replies: 2
- Views: 1125
- by ch0719
Tue Dec 09, 2008 8:04 pm- Forum: Problem Solving
- Topic: sequence problem
- Replies: 3
- Views: 1293
- by ch0719
Tue Dec 09, 2008 6:55 pm- Forum: Problem Solving
- Topic: sequence problem
- Replies: 3
- Views: 1293
- by ch0719
Tue Dec 09, 2008 6:54 pm- Forum: Problem Solving
- Topic: radious
- Replies: 2
- Views: 1125
- by ch0719
Tue Dec 09, 2008 6:53 pm- Forum: Problem Solving
- Topic: sequence problem
- Replies: 3
- Views: 1293
AB=OC (given) and OC=OB (since both are radii of the semicircle) => AB=OC=OB =>angles BAO=BOA=OBC=OCB=x (angles opposite equal sides) We need to find x. 1. COD is 60 BOA+BOC+COD=180 (supplementary angles) x+(180-2x)+60=180 We can find x, so STM 1 is suff. 2.BCO=40 i.e. x =40 STM 2 is suff. So answe...
- by ch0719
Mon Dec 08, 2008 2:22 pm- Forum: Data Sufficiency
- Topic: Question from GPREP
- Replies: 5
- Views: 1437