Odds for one Ace to be dealt (math help)

[EdSchurr]

Could someone explain to me how you find the odds for exactly one Ace to be dealt, and for exactly two Aces to be dealt preflop to any of 18 cards. Assume two of the kings are missing.

I can't get my simple AND and OR probability math to work here. It looks like one needs the Choose function, but I can't really figure it out.

Thanks

[Evan]

You'll probably get better answers in the Probability forum.

[EdSchurr]

Whoops, I missed that one.