BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

GMAT prep software question

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 17
Joined: Sat May 12, 2007 11:11 am

GMAT prep software question

by atarafder » Tue May 15, 2007 6:43 pm
I can figure out how A is sufficient.

Can you show me how B is sufficient?
Since the average daily balance was $540 at the end of the 25th day, the payment of $300 had been already applied to the balance?
Can a part of the payment be applied after the 25th?
Attachments
q5.GIF
Top
Source: — Data Sufficiency |
User avatar
Community Manager
Posts: 789
Joined: Sun Jan 28, 2007 3:51 pm
Location: Silicon valley, California
Thanked: 30 times
Followed by:1 members

Re: GMAT prep software question

by jayhawk2001 » Tue May 15, 2007 9:02 pm
atarafder wrote:I can figure out how A is sufficient.

Can you show me how B is sufficient?
Since the average daily balance was $540 at the end of the 25th day, the payment of $300 had been already applied to the balance?
Can a part of the payment be applied after the 25th?
The average can be computed as

[ 600*x + 300*(30-x) ] / 30

1 - sufficient. We know x = 21. So, we can compute the average

2 - sufficient. Payment already applied. You can use the above
formula but replace 30 with 25 and equate it to 540. You can solve
for x and then compute the average for 30 days.

Hence D.
Top
Junior | Next Rank: 30 Posts
Posts: 17
Joined: Sat May 12, 2007 11:11 am

by atarafder » Wed May 16, 2007 6:06 pm
great. Thanks!
Top
Post new topic Post Reply
• Page 1 of 1