Mathematics, 23.01.2021 18:50 mememe87

A museum has 7 paintings by Picasso and wants to arrange 3 of them on the same wall. How many ways are there to do this? If 9 people come to view the 3 paintings, how many ways can they look at the paintings?

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A museum has 7 paintings by Picasso and wants to arrange 3 of them on the same wall. How many ways a...