a rugby team

Expert replies

sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Thu May 06, 2010 5:37 am

After 5 games, a rugby team had an average of 28 points per game. In order to increase the average by n points, how many points must be scored in a 6th game?
(A) n
(B) 6 n
(C) 28 + 6 n
(D) 28 n
(E) 32 n

The mind is everything. What you think you become. -Lord Buddha

Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com

Like this post

Source: Beat The GMAT — Problem Solving | Thu May 06, 2010 5:37 am

liferocks: Legendary Member; Posts: 576; Joined: Sat Mar 13, 2010 8:31 pmFollowed by: 1 member; Thanked: 97 times

by liferocks » Thu May 06, 2010 6:02 am

to increase avarage by n points for the 5 games sum need to increase by 5n and the new avarage will be 28+n

so points required from 6th game is=28+n+5n=28+6n

Ans option C

"If you don't know where you are going, any road will get you there."
Lewis Carroll

Like this post

clock60: Legendary Member; Posts: 759; Joined: Mon Apr 26, 2010 10:15 amFollowed by: 3 members; Thanked: 85 times

by clock60 » Thu May 06, 2010 11:43 am

also got C
(28*5+x)/6=28+n
x=28+6n

Like this post

harshavardhanc: Legendary Member; Posts: 526; Joined: Sat Feb 21, 2009 11:47 pm; Location: India; Thanked: 68 times; GMAT Score:680

by harshavardhanc » Thu May 06, 2010 12:05 pm

sanju09 wrote:After 5 games, a rugby team had an average of 28 points per game. In order to increase the average by n points, how many points must be scored in a 6th game?
(A) n
(B) 6 n
(C) 28 + 6 n
(D) 28 n
(E) 32 n

you can view it as a series of five 28s . i.e. 28,28,28,28 and 28.

Now, if the avg needs to become 28+n, you need to add n to each of the five numbers PLUS the sixth one should itself be 28+n.

therefore, total increase 28+6n

IMO C.

Regards,
Harsha

Like this post

thephoenix: Legendary Member; Posts: 1560; Joined: Tue Nov 17, 2009 2:38 amFollowed by: 5 members; Thanked: 137 times

by thephoenix » Thu May 06, 2010 12:08 pm

total=5*28
let in the 6th game scored x
new total=5*28+x
new avg=(5*28+x)/6
diff is new avg-old avg=n
i.e (5*28+x)/6-28=n
solving x=6n+28

Many of the great achievements of the world were accomplished by tired and discouraged men who kept on working

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