Not sure Broomers but even though each team theoretically has the same mathematical chance of drawing one of the others it doesn't work out that way because once a fixture or team is taken out of the equation it reduces the possibilites for the rest so the odds shorten for every fixture that is 'settled'.
Each team can in theory draw any of the 23 other teams home and away.
Of those combinations, only 36 would involve 6 specific teams drawn against each other.
However, as above, the odds change as more fixtures are drawn.
Over to someone else to continue........