Statistics

Expert replies

pratyoosh: Senior | Next Rank: 100 Posts; Posts: 57; Joined: Sat Apr 10, 2010 6:20 am

by pratyoosh » Sat Nov 13, 2010 10:20 am

Hello,

Can anyone Opine on the below DS question:

1. For the students in class A, the range of heights is r centimeters and the greatest height is g centimeters. For the students in class B, the range of heights is s centimeters and the greatest height is h centimeters. Is the least height of the students in class A greater than the least height of the students in class B?
a. R < s
b. G > h

Thanks.

Like this post

Source: Beat The GMAT — Problem Solving | Sat Nov 13, 2010 10:20 am

selango: Legendary Member; Posts: 1460; Joined: Tue Dec 29, 2009 1:28 amFollowed by: 7 members; Thanked: 135 times

by selango » Sat Nov 13, 2010 10:27 am

Please post this in DS section

--Anand--

Like this post

pratyoosh: Senior | Next Rank: 100 Posts; Posts: 57; Joined: Sat Apr 10, 2010 6:20 am

by pratyoosh » Sat Nov 13, 2010 10:28 am

Ok.

Like this post

PraveenKumar.Rajan: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Fri Jul 23, 2010 3:40 am

by PraveenKumar.Rajan » Wed Mar 23, 2011 9:49 pm

Both a & b together answers the queestion.
So answer choice should be D.

First consider (a),from range alone we could not come to a conclusion.
Then consider (b),from largest value we could not determine the least value.

When we take (a) & (b) together

First consider (b) which says G>H

Let G be 100 & H be 99 which is the maximum number that H can hold to meet G>H

Now consider (b) which says the range of A is smaller than that of B,R<S

Let S be 10 and R be 9 which meets R<S

So,least value for A is (100 - 9) which is 91
least value for B is (99 -10) which is 89

Thus, least value of A is always greater than the least value of B.

Like this post

srcc25anu: Master | Next Rank: 500 Posts; Posts: 423; Joined: Fri Jun 11, 2010 7:59 amFollowed by: 2 members; Location: Seattle, WA; Thanked: 86 times

by srcc25anu » Wed Mar 23, 2011 10:14 pm

You got the qustion right ... just be careful with the choices. when both statements are sufficient, its C

PraveenKumar.Rajan wrote:Both a & b together answers the queestion.
So answer choice should be D.

First consider (a),from range alone we could not come to a conclusion.
Then consider (b),from largest value we could not determine the least value.

When we take (a) & (b) together

First consider (b) which says G>H

Let G be 100 & H be 99 which is the maximum number that H can hold to meet G>H

Now consider (b) which says the range of A is smaller than that of B,R<S

Let S be 10 and R be 9 which meets R<S

So,least value for A is (100 - 9) which is 91
least value for B is (99 -10) which is 89

Thus, least value of A is always greater than the least value of B.

Like this post

force5: Legendary Member; Posts: 582; Joined: Tue Mar 08, 2011 12:48 amFollowed by: 6 members; Thanked: 61 times; GMAT Score:740

by force5 » Wed Mar 23, 2011 11:42 pm

IMO E

what is the OA??

Like this post

selango: Legendary Member; Posts: 1460; Joined: Tue Dec 29, 2009 1:28 amFollowed by: 7 members; Thanked: 135 times

by selango » Thu Mar 24, 2011 12:44 am

Class A
--------------
g-LA=r

Class B
-------------
h-LB=s

Is LA>LB?

stmt1,

r<s

g-LA<h-LB

We dont know any info abt LA and LB.

Insuff

stmt2,

g>h

r+LA>s+LB

We still don't know any info abt LA and LB.

Combining 1 and 2,

r<s or-r>-s

g>h

-->g-r>h-s

LA>LB

Suff

Pick C

--Anand--

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review