Search found 27 matches
@Testluv: Can you explain me why B is wrong?
I am thinking if there are other transportation modes(buses etc..) then it can reduce the crowd at the subways.
Thanks
- by aa2kash
Thu Dec 24, 2009 3:13 pm- Forum: Critical Reasoning
- Topic: Crowding on Mooreville’s subway
- Replies: 6
- Views: 7424
. Good luck for the applications.
- by aa2kash
Mon Nov 16, 2009 1:44 pm- Forum: I just Beat The GMAT!
- Topic: Thanks all -Got 700 !
- Replies: 15
- Views: 5029
Sets
50% of the aparments in a certain building have windows and hardwood floors. 25% of the apartments without windows have hardwood floors. If 40% of the apartments do not have hardwood floors, what percent of the apartments with windows have hardwood floors? A. 10 B. 16 2/3 C. 40 D. 50 E. 83 1/3 Pleas...
- by aa2kash
Mon Oct 26, 2009 6:50 am- Forum: Problem Solving
- Topic: Sets
- Replies: 4
- Views: 1625
MY mistake :) I did 8*7= 48 yes the answer is 35/56 = 5/8 Explaination : 3W and 5B balls are there. case1 mary draws a white ball and then john draws a blue ball : p=3/8 * 5/7 =15/56 note when a white ball is withdrawn there are total 7 balls remaining. case2 mary draws a blue ball and then john dra...
- by aa2kash
Tue Oct 13, 2009 7:45 am- Forum: Problem Solving
- Topic: Basket
- Replies: 10
- Views: 2038
Re: Blue balls
A basket contains 3 white and 5 blue balls. Mary will extract one ball at random and keep it. If, after that, John will extract one ball at random, what is the probability that John will extract a blue ball? My Answer is 35/48. took 2 cases. 1 mary draws a blue ball and in 2nd if mary draws a white...
- by aa2kash
Tue Oct 13, 2009 7:24 am- Forum: Problem Solving
- Topic: Basket
- Replies: 10
- Views: 2038
Re: Probability
As part of a game, four people each must secretly choose an integer between 1 and 4, inclusive. What is the approximate likelihood that all four people will choose different numbers? Is this correct way to solve: 1. Probability that same number is selected by all 4 people First number - irrelevant ...
- by aa2kash
Tue Oct 13, 2009 2:43 am- Forum: Problem Solving
- Topic: Probability
- Replies: 9
- Views: 2988
Answer is 63/64. But is my approach correct? What is the source of this question?? If you are reffering to a standard material then definately you will see the Answer to be 3/32. As per your method the answer is coming out to be 63/64 i.e nearly 99%. If you think logically then also its not possibl...
- by aa2kash
Tue Oct 13, 2009 2:31 am- Forum: Problem Solving
- Topic: Probability
- Replies: 9
- Views: 2988
1) first person can choose anything number which translates to 4/4
2) second person choosing other number that hasn't been chosen 3/4
3) Third person choosing ...2/4
4) Last person = 1/4
multipy them 4*3*2*1/4*4*4*4 = 6/64
Please tell the OA.
- by aa2kash
Mon Oct 12, 2009 5:22 am- Forum: Problem Solving
- Topic: Probability
- Replies: 9
- Views: 2988
b=4k+1 4=ak+1 b+1=ak+1 solving k=1/2 dont get it! it seems too complicated!! As per the question there are 3 points which are lying on the line,so they must satisfy the equation of the line. Putting the values we get b=4k+1 --1 4=ak+1 ---2 b+1=ak+1 ----3 from 2 and 3, right hand side is same i.e ak...
- by aa2kash
Mon Oct 12, 2009 5:04 am- Forum: Problem Solving
- Topic: help solving this geometry problem
- Replies: 3
- Views: 1182
Re: Prime Numbers problem
Hi Folks, I found this problem in the Advanced GMAT problems material. Please help solving it using a shortcut method. Q> if p and q are primes, how many divisors does the product p^3.q^6 have? Choices> a) 8 b) 12 c) 18 d) 28 e) 36 Answer is d. @Divya no of divisors is multiplication of (powers of ...
- by aa2kash
Fri Oct 09, 2009 5:29 am- Forum: Problem Solving
- Topic: Prime Numbers problem
- Replies: 2
- Views: 1363
Re: Set quest
9. This semester, each of the 90 students in a certain class took at least one course from A, B, and C. If 60 students took A, 40 students took B, 20 students took C, and 5 students took all the three, how many students took exactly two courses? Remember these following general formulas for three-c...
- by aa2kash
Wed Oct 07, 2009 6:23 am- Forum: Problem Solving
- Topic: Set quest
- Replies: 5
- Views: 1417
Re: X
Still cannot understand why x is 1 or -1? Are we just assuming that b/c it has no coefficient. @Eman : As you already know that a line equation is in the form of ax+by+c=0 here: a is the co-efficient of x b is the co-efficient of y So if you look at the line equation given to us x-3y -7=0 this can ...
- by aa2kash
Wed Oct 07, 2009 5:31 am- Forum: Problem Solving
- Topic: XY Problem #2 OG 12 88
- Replies: 7
- Views: 1653
Can you please explain how height is 12/5? @Sanjana to find the shortest distance between a point and a line, you need to draw a perpendicular from the point to the line. For example let the point be (h,k) and an equation of a line is ax+by+c=0. the distance= |ah+bk+c|/sqrt(a*a + b*b) in the exampl...
- by aa2kash
Wed Oct 07, 2009 2:43 am- Forum: Problem Solving
- Topic: least possible distance
- Replies: 8
- Views: 1539
Remember the general formulas
Number of diagonals can be drawn from 1 vertex in n sided polygon is (n - 3)
Total number of diagonals that can be drawn is n(n-3)/2
as per ur question n is 20. as one of its vertices doesn't connect.
Hope it helps.
- by aa2kash
Wed Sep 23, 2009 2:21 pm- Forum: Problem Solving
- Topic: How many diagonals does a polygon with 21 sides have?
- Replies: 8
- Views: 14896
35 lbs
80% dry fruit(as remaining 20% is water) is obtained from 28% fruit
for 100 % dry fruit = 28/80 (the amount of fruit req)
so from 100 lbs of fruit, u will get 28*100/80=35 lbs of dry fruit.
- by aa2kash
Mon Sep 21, 2009 7:47 am- Forum: Problem Solving
- Topic: Mixture Question 1
- Replies: 3
- Views: 1155