Hello,
Had a question from MGMAT Guide 1 (5th edition) Page 99:
Bradley owns b video game cartridges. If Bradley's total is one-third the total owned by Andrew and four times the total owned by Charlie, how many video game cartridges do the three of them own altogether, in terms of b?
Answer given is (13/4)b
However, I am getting (17/4)b. My approach is as follows:
Bradley - b
b = (1/3)a (a - Andrew's video game cartridges)
b = 4c (c - Charlie's video game cartridges)
a+b+c = 3b + b + (1/4)b = (17/4)b
I am not sure where I am going wrong. Can you please help? Thanks.
Regards,
Sri
FDP Strategies problem
This topic has expert replies
-
- Legendary Member
- Posts: 641
- Joined: Tue Feb 14, 2012 3:52 pm
- Thanked: 11 times
- Followed by:8 members
- KapTeacherEli
- GMAT Instructor
- Posts: 578
- Joined: Tue Aug 25, 2009 6:00 pm
- Thanked: 136 times
- Followed by:62 members
It looks to me like all of your math checks out.
13/4 b is the answer that you would get adding just Andrew and Charlie together. As is often the case with GMAT problems, this one gives you an opportunity to solve for the wrong thing. It's likely that the text of the problem got tweaked slightly after or in parallel to the explanation being written, and the explanation is for the problem without Bradley's total; such errors happen rarely but regularly in many companies' practice material (including our own here at Kaplan!). I recommend PMing one of the MGMAT reps who posts regularly around these forums--I'm sure they'll get the answer corrected ASAP.
13/4 b is the answer that you would get adding just Andrew and Charlie together. As is often the case with GMAT problems, this one gives you an opportunity to solve for the wrong thing. It's likely that the text of the problem got tweaked slightly after or in parallel to the explanation being written, and the explanation is for the problem without Bradley's total; such errors happen rarely but regularly in many companies' practice material (including our own here at Kaplan!). I recommend PMing one of the MGMAT reps who posts regularly around these forums--I'm sure they'll get the answer corrected ASAP.
-
- Legendary Member
- Posts: 641
- Joined: Tue Feb 14, 2012 3:52 pm
- Thanked: 11 times
- Followed by:8 members