Imagine that 4 cards have been removed from a pack of 52 cards and placed face down in front of you. If you were to choose any two of the four, the chances of getting two red cards is 50%. What are the chances of picking a black pair?
As ever, please do NOT post your answers, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.