Riddle of the Day

[Gizmokid2005]

There is a town where a quarter of all the people living have unlisted phone numbers. If you select 100 names at random from the town's phone book, on average how many of these people would have unlisted phone numbers?

ANSWER (Congrats TL): None. They were unlisted....ie - NOT IN THE PHONE BOOK....

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If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?