Q on expected outcome

[Sonal7]

I have a question regarding Q11. I made the same caclulations as the answer book for spinner 1 versus 2. But my answer for the others differ. Is my method wrong?




in 1 versus 3, P (1 win) should work out to be [MATH]3/6*2/5+2/6*4/5+1/6*4/5[/MATH]. Is this not 2/3?

 

[tkhunny]

in 1 versus 3, P (1 win) should work out to be [MATH]3/6*2/5+2/6*4/5+1/6*4/5[/MATH]. Is this not 2/3?

Nope. 3/5
You seem to have the right idea. Arithmetic error, somewhere..

 

[Dr.Peterson]

But still, it isn't 16/30 as they say!

 

[Sonal7]

Sorry to be a time waster again. I think i have reached a point where I should trust my gut feeling that I am right.

 

[Sonal7]

Nope. 3/5
You seem to have the right idea. Arithmetic error, somewhere..

yes its 3/5th. So my method was correct.

 

[JeffM]

yes its 3/5th. So my method was correct.

Your logic was completely correct but not your original arithmetic.

 

[Sonal7]

Thank you