The answer is 0.071.
The chances of drawing an ace in the first draw is 4/52. The chances of not drawing an ace in the second draw is 48/52. The chances of getting only one ace in the two draws can be solves using this equation:
P(X=1) = (4/52) * (48/52)
= 192/2704
= 0.0710059 or
0.071
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