GMAT Data Sufficiency Discussions

nuttyvarun · August 8, 2009, 1:21am

puys i got the new 12 edition. i will do the qs over the week end and will try to post tough ques in DS and SC.

Sid

hey Sid.. I have heard the CR is the tuffest in OG12.. post some of those if possible 😉

nuttyvarun · August 8, 2009, 1:25am

NOPE.I will not buy that idea.the term average itself means that its not constant but its an average over a period of time.yours entire approach is based on the last two term-entire trip.
Option has to be A.
BTW C can not be the answer

good for you..

siddharthaduggirala · August 8, 2009, 2:03am

nuttyvarun Says
hey Sid.. I have heard the CR is the tuffest in OG12.. post some of those if possible ;)

Oh sure man.. I will only eat OG over the week end

nuttyvarun · August 8, 2009, 2:21am

siddharthaduggirala Says
Oh sure man.. I will only eat OG over the week end

I hope loose-motion or constipation na ho jaye.. both cud be harmful..

siddharthaduggirala · August 8, 2009, 2:24am

In the rectangular coordinate system, are the points (a, b) and (c, d) equidistant from the origin?
(1) a/b = c/d
2) + = +

nuttyvarun · August 8, 2009, 2:41am

In the rectangular coordinate system, are the points (a, b) and (c, d) equidistant from the origin?
(1) a/b = c/d
2) + = +

I think this same question has been posted by you (or gutsy) in the past.. and Bhavin and I had a discussion on the same, where I fell right on my face..

anyway.. I believe the answer is option C

Option (1): Absolute crap.. not sufficient.. ignore this for now. ;)

Option (2): this in a way tell you the sum of modulus of the coordinates of the point is same..

a+|b| = |c|+d

but this doesnt help either..

combining both the statements...
you get to know that the ratios are same, and also the sum of the modulus is same.. so it can be solved.. basically the mathemtician should be able to find the answer in YES or NO..

nuttyvarun · August 8, 2009, 2:50am

got it.. it was you only..

http://www.pagalguy.com/forum/gmat-and-related-discussions/20702-gmat-data-sufficiency-discussions-137.html#post1594398

I think this same question has been posted by you (or gutsy) in the past.. and Bhavin and I had a discussion on the same, where I fell right on my face..

..

vikram2010 · August 8, 2009, 9:53pm

Try this simple one:

Last year 4/5th of the applicants for a job on a police force passed the physical examination. If 3/4th of the applicants who passed the physical examination also passed the written examination, how many of the applicants passed both examinations ?

(1) The number of applicants who did not pass either examination was equal to the number who passed the written examination only.

(2) There was a total of 100 applicants.

vikram2010 · August 8, 2009, 9:54pm

if denotes an operation, what is the value of (ab) c ?

(1) a b = 5
(2) 5 c = 3

pj02 · August 8, 2009, 10:04pm

if denotes an operation, what is the value of (ab) c ?

(1) a b = 5
(2) 5 c = 3

Both are needed.

pj02 · August 8, 2009, 10:23pm

Try this simple one:

Last year 4/5th of the applicants for a job on a police force passed the physical examination. If 3/4th of the applicants who passed the physical examination also passed the written examination, how many of the applicants passed both examinations ?

(1) The number of applicants who did not pass either examination was equal to the number who passed the written examination only.

(2) There was a total of 100 applicants.

2 alone is sufficient.

Assume there were 5 applicants.. then
number of applicants passing physical xam= 4
number of applicants who did not pass=1

Now out of 4 applicants who have passed physical... 3 passed the written one.

So 1 guy failed here.
and 3 people passed both exams.

Writing it again:

Total.....................Physical..........................Written
...5........................4..................................
.............................4...................................3

Now consider option 1 :

The number of applicants who did not pass either examination was equal to the number who passed the written examination only. --> this is nothing but we already know. INSUFFICIENT.

Now look at 2nd option:

Total number of applicants=100.

This means.. 5---> 100 =5*20

So total applicants passing both the exams : 3 * 20 = 60

deepakraam · August 9, 2009, 12:54pm

if denotes an operation, what is the value of (ab) c ?

(1) a b = 5
(2) 5 c = 3

Both statements are needed to solve this q

deepakraam · August 9, 2009, 1:02pm

Try this simple one:

Last year 4/5th of the applicants for a job on a police force passed the physical examination. If 3/4th of the applicants who passed the physical examination also passed the written examination, how many of the applicants passed both examinations ?

(1) The number of applicants who did not pass either examination was equal to the number who passed the written examination only.

(2) There was a total of 100 applicants.

I guess statement 2 alone is suff to ans the q

kshankareswaran · August 9, 2009, 1:14pm

hey guys......need help.........i have started with my DS prep...but i face a lot of problems to find whether the quest can b solved with any 1 option or both or its insufficient.pls help..what can i do to improve

amsey1382 · August 9, 2009, 1:53pm

Q2:
If 2 different representatives are to be selected at random from a group of 10 employees and if p is the probability that both representatives selected will be women, is p > 1/2 ?
(1) More than of the 10 employees are women.
(2) The probability that both representatives selected will be men is less than 1/10

shubhdecaprio · August 9, 2009, 4:16pm

Last year the average salary of the 100 employees of company X was $43,800.What is the average salary of the same 100 employees this year?

1)For 80 of the 100 employees,this year's salary is 15% greater than last year's salary
2)For 20 of the 100 employees,this years salary is same as last years.

IMO C

nuttyvarun · August 9, 2009, 4:44pm

Last year the average salary of the 100 employees of company X was $43,800.What is the average salary of the same 100 employees this year?

1)For 80 of the 100 employees,this year's salary is 15% greater than last year's salary
2)For 20 of the 100 employees,this years salary is same as last years.

IMO C

the answer must be option E

you need values to be able to find out the average salary for prev year.. both option 1 and option 2 provide you with relative values and nothing concrete..

nuttyvarun · August 9, 2009, 4:45pm

Q2:
If 2 different representatives are to be selected at random from a group of 10 employees and if p is the probability that both representatives selected will be women, is p > 1/2 ?
(1) More than of the 10 employees are women.
(2) The probability that both representatives selected will be men is less than .

seems you missed something in the question stem.. cud you please re-check 😉

nuttyvarun · August 9, 2009, 4:49pm

Try this simple one:

Last year 4/5th of the applicants for a job on a police force passed the physical examination. If 3/4th of the applicants who passed the physical examination also passed the written examination, how many of the applicants passed both examinations ?

(1) The number of applicants who did not pass either examination was equal to the number who passed the written examination only.

(2) There was a total of 100 applicants.

the answer must be option B

if you apply the eqn 1 to any value, say 100, 200, 300 etc, the eqn 1 would always be satisfied.. but there is no single answer..

with eqn 2, you know total applicants = 100, hence u can solve it easily..

lemme know the OA 😉

amsey1382 · August 9, 2009, 6:23pm

nuttyvarun Says
seems you missed something in the question stem.. cud you please re-check ;)

Hey nutty corrected..