Probability so. holding a better hand preflop

[peyote]

I'm sure this has been asked before but couldn't find anything...

Given the following scenario:
I'm UTG in a 6-handed Holdem game and I raise the X percent best hands (say 10%)... What is the probability that at least one player holds

- a better hand (vs. my range)?
- a hand from the same range (the X percent best hands)?

Thanks in advance...