Caroline, Joan and Sam all go shopping. They all buy a present, and all of the presents are the same size and wrapped in the same paper. At the check-out the parcels get mixed up. What is the probability that……
1) At least one of the three women gets the present she bought?
2) Only one woman gets a wrong present?
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.