Khan/khan-exercises — Issue #4262: Mean median and mode - Arithmetic mean problem
Author: KhanBugz
Created: 2011-10-13 00:48:38+00:00
State: open
Labels: chrome, win7

Reporter: bsisman@gmail.com

I am unable to proceed in the mean median mode practice. Given the following problem:
What is the arithmetic mean of the following numbers?

8,5,7,6,8,9,2

The mean should be 45/7 = 6.428571429.

As far as I am aware (and I have Googled it as well) .428571429 can not be expressed as a fraction. Entering 6.428571429 does not allow me to proceed. Perhaps I'm missing something exceedingly obvious but I think there may be an error on this practice problem.

[mean_median_and_mode.html?seed=113&problem=mean](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/mean_median_and_mode.html?seed=113&problem=mean)

["8","8","7"]

Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1

MathJax is loaded, ready, queue length: 0