NBA Draft Lottery Problem

[WaimanaloSlim]

The probability of the Celtics winning the #1 pick is 19.9%
The probability of the Celtics winning the #2 pick is 18.8%

So, is the probability of the Celtics winning either the #1 or #2 pick:

0.199 + 0.188

Or is it:

1-((1-0.199)*(1-0.188))


(Or maybe it's even something else?)