What's the probability of????

[h_ven]

I have KK.

What is the probability of someone having AA and someone else have JJ in the same hand?

[Green Monster]

a (specific) player holding AA: 4/50*3/49 = 1/204.167
" JJ: 4/48*3/47 = 1/188
ways both hands can be dealt (at a full table): 9c2 = 36
odds that players hold AA and JJ if you hold KK (or any other pair except AA or JJ) at a 10 player table:
1/204.167 * 1/188 * 36 ~= 1/1066