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

Redeem

Carrie, Lisa, and Betty

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 7187
Joined: Thu Sep 07, 2017 4:43 pm
Followed by:23 members

Carrie, Lisa, and Betty

by BTGmoderatorDC » Wed Jan 03, 2018 3:55 am
Carrie, Lisa, and Betty all make purchases at a music store that sells all records for a certain price and all CDs for a certain price. How much does Carrie pay for 1 record and 2 CDs?

(1) Lisa bought 3 records for $22.50.

(2) Betty bought 2 records and 4 CDs for $55.00.

Isn't statement 1 sufficient?

OA B
Top
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 2663
Joined: Wed Jan 14, 2015 8:25 am
Location: Boston, MA
Thanked: 1153 times
Followed by:128 members
GMAT Score:770

by DavidG@VeritasPrep » Wed Jan 03, 2018 4:29 pm
lheiannie07 wrote:Carrie, Lisa, and Betty all make purchases at a music store that sells all records for a certain price and all CDs for a certain price. How much does Carrie pay for 1 record and 2 CDs?

(1) Lisa bought 3 records for $22.50.

(2) Betty bought 2 records and 4 CDs for $55.00.

Isn't statement 1 sufficient?

OA B
Think about it algebraically: call the cost of one record "R" and the cost of one CD "C." The cost of one record and two CD's would be R + 2C.

Statement 1: 3R = 22.50. Allows us to solve for R, but nothing about C. Not Sufficient.

Statement 2: 2R + 4C = $55.00
Divide both sides by 2 to get R + 2C = $27.50. Because we have a unique value for R + 2C this statement alone is sufficient. The answer is B
Veritas Prep | GMAT Instructor

Veritas Prep Reviews
Save $100 off any live Veritas Prep GMAT Course
Top
Post new topic Post Reply
• Page 1 of 1