the question asks:
How many 5-card poker hands consisting of 2aces and 3 kings are possible with an ordinary 52-card deck?
this is what i did:
"c"=stands for combination
(4C2) * (4C3) = 6*4 = 24
(52C5) = 259860
so then i divided :
(24)/(259860)= 9.2344630159756210176378243605134e-6
Looks right.
Cept the question asks for the number of possible hands; I would have stopped at 24. But, good job, you went further and gave the probability of drawing such a hand.