Standard Deviation with number cubes question

Algebra
Tutor: None Selected Time limit: 1 Day

Find the mean and standard deviation of the sums you should get when you roll two standard number cubes.

Jul 30th, 2015

Thank you for the opportunity to help you with your question!

Solution.png 

Please find attached solution, Hope my solution is helpful for you.

Thank You

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 30th, 2015

The way you solved it is much more complicated than what I have learned so far. Is there a simpler way to solve this? 

Jul 30th, 2015

Ok, but according to me is more simple and give accurate answer to your solution.

Thank You

Jul 30th, 2015

I understood what you were doing in the first and second charts, and in understood what you were doing in the first column of the third charts, but the next two columns did not make sense to me

Jul 30th, 2015

Dear, If you see formula you can understand easily......Thank You

Jul 30th, 2015

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Jul 30th, 2015
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Jul 30th, 2015
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