Lesson: Word Problems with Fractions

Rate this video: 

Comment on Word Problems with Fractions

I solved the candy question slightly different, but still got $4 as the answer. 1/3+5/9=24/27 (spent on movie and hat). So the remainder she spent on candy is 3/27. Then i multiplied 3/27*36 and got $4. Thanks!
gmat-admin's picture

Perfectly valid approach!


I have a doubt on the question 189 from the O.G. (2017 edition). Could you explain me in a different answer from the OG Answer Explanations, please?

Thank you in advance.
gmat-admin's picture

No problem.

Please see my solution here: http://www.beatthegmat.com/problems-151-and-226-in-the-og-13-t283699.html


Thank you very much!

gmat-admin's picture

Aha! I had a hunch your name wasn't Phlemos!

A satellite is composed of 30 modular units, each of which is equipped with a set of sensors, some of which have been upgraded. Each unit contains the same number of non-upgraded sensors. If the number of non-upgraded sensors on one unit is 1/5 the total number of upgraded sensors on the entire satellite, what fraction of the sensors on the satellite have been upgraded?

A. 5/6
B. 1/5
C. 1/6
D. 1/7
E. 1/24

Hi Brent, I am failing to get an answer to this question:


and U=1/5*N making N=6U

therefore my answer = 1/6 but apparently, the answer is 1/7. Could you please help.
gmat-admin's picture

Add a comment

Tweet about our course!

If you're enjoying our video course, help spread the word on Twitter.

Change Playback Speed

You have the option of watching our videos at various speeds (25% faster, 50% faster, etc). To change the playback speed, click the settings icon on the right side of the video status bar.

Have a question about this video?

Post your question in the Comment section below, and we’ll answer it as fast as humanly possible.

Free “Question of the Day” emails!