Using votre main

Question

In the lesson: Raise your hand please, I used votre main since clearly another person is involved, the one telling someone else to raise her hand. Why is la main the correct usage? Thanks much.

Cécile Janty-Davies · Accepted Answer

Hi Liz, 
You would use - 
Levez la main si vous connaissez la réponse! = Raise your hand if you know the answer
For instance to a group whether you said tu or vous to them. 
Each person raising their own hand. 
If you said -
Levez les mains! 
Each would raise both hands in the air.
Hope this helps!

Chris Wirt · Answer

There is no possibility for misunderstanding if you say la main in this case, either to a group or to a single person (formal "you").