Search found 342 matches
22% of 2500 people are suffering from depression => 22*2500/100 = 550 people are suffering from depression. Out of these 550 people, 20% are at least 60 yrs old => 20*550/100 = 110 people are at least 60 yrs and suffering from depression. Now, 25% of total population is at least 60 yrs old => 25*250...
- by Birottam Dutta
Fri Jul 27, 2012 10:05 pm- Forum: Problem Solving
- Topic: Percent Problem - EZ Solutions
- Replies: 6
- Views: 1449
|2x + 3| > |7x - 2|
=> 2x + 3 > 7x-2 or x<1------ (1)
|2x + 3| > |7x - 2|
=> 2x-3< -(7x-2) or -1/9 <x.--- (2)
Again, -(2x-3) < (7x-2) which again gives -1/9<x.
Combining (1), (2) and (3), we get,
-1/9<x<1.
My answer is C!
- by Birottam Dutta
Fri Jul 27, 2012 7:10 pm- Forum: Problem Solving
- Topic: Inequality with Modulus
- Replies: 5
- Views: 1035
B cannot be a conclusion because we do not know whether this is a one off case or something that is happening on a routine basis. So, B cannot be the conclusion. On the basis of what has been stated in the question stem, only C can be inferred to be correct. Since the vase is being pulverized, it wi...
- by Birottam Dutta
Fri Jul 27, 2012 6:41 pm- Forum: Critical Reasoning
- Topic: Pulverized Vase
- Replies: 8
- Views: 2178
See,
When Sam allows for a 16 m head start he and john reach at the same time, so Sam requires the 4 seconds to cover this additional 16m.
Hence, speed of Sam = 16/4 = 4 m/s.
Therefore, time taken by Sam to run the 100m race = 100/4 = 25 seconds.
Answer = B!
- by Birottam Dutta
Fri Jul 27, 2012 6:27 pm- Forum: Problem Solving
- Topic: Lead in a race
- Replies: 4
- Views: 1225
The triangle specified here is a right angled triangle (9^2 + 40^2 = 41^2).
Always remember that in a right triangle, the hypotenuse is the diameter of the circumcircle and the centre is exactly the mid point of the hypotenuse.
So, diameter here is 41 and so, radius = 41/2 = 20.5
Answer B!
- by Birottam Dutta
Fri Jul 27, 2012 6:22 pm- Forum: Problem Solving
- Topic: Radius of Circle
- Replies: 3
- Views: 1270
As 2 students did not opt for any class, Number of students who opted for at least one class = 50-2 = 48. let a be no of students who opted for only math. let c be no of students who opted for only science. let b be no of students who opted for both math and science. as 10 did not opt for math, c=10...
- by Birottam Dutta
Fri Jul 27, 2012 6:12 pm- Forum: Problem Solving
- Topic: Class of Students
- Replies: 3
- Views: 927
First of all, in D rather than is replaced by instead of. And D is correct in parallelism as well because retiring... facing...rising. It has to be have elected and not had elected because the activity is centered around the past few years, that is from a few years back to present. So, it will be ha...
- by Birottam Dutta
Tue Jul 24, 2012 5:16 am- Forum: Sentence Correction
- Topic: Doubt
- Replies: 1
- Views: 925
A small trick here.
2. basically says that y=0. But it does not say anything about x right. If x were to be zero as well, then the equality would hold. So, we cannot say for sure based on 2 alone.
Using both the statements, we can say for sure that the equality will not hold, hence C is the answer.
- by Birottam Dutta
Mon Jul 23, 2012 5:28 pm- Forum: Data Sufficiency
- Topic: X+Y = X.Y
- Replies: 2
- Views: 946
Actually E is also pointing out a flaw but it is opposite to the flaw under question here. The flaw under question is one wherein many people who are above poverty or are rich people are still branded as poor. E points out a flaw which will lead to poor people (in terms of income) being in above pov...
- by Birottam Dutta
Mon Jul 23, 2012 6:30 am- Forum: Critical Reasoning
- Topic: a household’s cash income
- Replies: 4
- Views: 1743
First of all get this general fact clear: A+b=0=> a= -b (taking b to the other side of the equality sign ). And sign changes when you take any quantity to the other side of the equality sign. Now question 1. 0= x/2 + 9. Drawing analogy form above, here a= x/2 and b=9. So, taking b to the other side,...
- by Birottam Dutta
Mon Jul 23, 2012 12:16 am- Forum: Problem Solving
- Topic: Algebra Problem
- Replies: 1
- Views: 818
Firstly, if we get into factual aspects of running for an election in Asia versus non-Asia, then we are missing the point of the question. I would suggest that please do not get into such things. Secondly, the question here is to arrive at the question, the answer to which would be best in evaluatin...
- by Birottam Dutta
Mon Jul 23, 2012 12:08 am- Forum: Critical Reasoning
- Topic: Verbal Help -- 2nd Verbal CR 40., not quite sure.
- Replies: 4
- Views: 1188
Well the meaning of both the sentences are not the same. The first and correct sentence actually negates the material aspect and puts all the blame on lack of preparation of the students. Your sentence says that the material was also a cause but to a lesser degree than the lack of preparation. I hop...
- by Birottam Dutta
Sat Jul 21, 2012 10:02 pm- Forum: Sentence Correction
- Topic: Parallelism
- Replies: 3
- Views: 1087
IMO B is the correct answer. It says that recycle is restricted to 20% of the waste as this is the percentage that can meet raw material specification once recycled. So if 50% needs to be recycled then it is a problem because the additional 30% will not be used thereby defeating the purpose of recyc...
- by Birottam Dutta
Sat Jul 21, 2012 2:08 am- Forum: Critical Reasoning
- Topic: CR weaken question
- Replies: 2
- Views: 1096
Option 2 has a misplaced "only". It seems to suggest that only the efforts since then have been partially successful.
Option 1 is correct.
- by Birottam Dutta
Sat Jul 21, 2012 2:03 am- Forum: Sentence Correction
- Topic: Doubt -- 2 options
- Replies: 2
- Views: 1036
First of all, we are not talking of Lincoln and Douglass as individuals here but together. In other words, the clause in the middle (separated by commas) is including both men in black history. Hence, the correct word here won't be each but both. On the basis of this, A and D are eliminated. Now, we...
- by Birottam Dutta
Sat Jul 21, 2012 1:42 am- Forum: Sentence Correction
- Topic: Question
- Replies: 2
- Views: 1588