These are all related to permutations, so I hope all three can be answered per your ruling. Thanks! - Find the number of distinguishable permutations of the digits of the number 287,772. - Marvin, Albert, Raff, Jeff and Ronald want to take a photo in which three of them are lined up in a row. How many different photos are possible? - How many photographs will 9 friends have if they will take a group picture of 4 at a time

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