Pearls for Valentine's Day
RAY: And the answer is -- yes. Because she can take all the pearls except for one black one and put them in box A.
TOM: Oh! So she takes all the black pearls, except for one, and dumps them in the other box.
RAY: In the remaining box she has one black pearl. So should she pick that box at random, she will certainly get a black pearl, and if she picks the other box her chances are still 50/50 or close to it.
[ Car Talk Puzzler ]