Omaha Hi Lo Probabilty questions

[goodguy_1]

I have a few questions about Omaha Hi-Low which I have started playing quite a bit.To get a better feel for the game.I have a few questions.These really are computational questions not strategy questions..thats why I'm posting it here..
Suitedness is not included in the hand rankings for simplicity.

Question #1-How many unique 4-card hands can you be dealt?

Question #2 Lets assume you have Group 1 and Group 2 hands:
Group 1 include:

AA23,AA2x,AA3x,A23x,A2KK,A2QQ,A345,A356,A2KQ,A2KJ, 23QQ,23KK,A3KK,A3QQ

Group 2 hands include:

A2xx,234x,AKQJ,KQJT,QQ23,QJT9,AAxx,KKQQ,A3xx,KKTT, KK24

How many hands are in each Group and what is the probabilty of receiving a Group1 or Group2 hand from a random hand?

Group 1 seems quite simple..being sure not to double-count AA2x,AA3x and A23x hands??

Group 2 how do we figure out the total number of hands here quickly specifically A2xx,A3xx and AAxx?

I know this is a simple question for you math genuises but I'm trying to get a bead on this and do it correctly and quickly..that why I came here [img]/images/graemlins/tongue.gif[/img]

[thylacine]

I hadn't heard of Group 1, 2, etc hands in O8. Where did you see these?