[填空题]
In an art museum, there are 8 different paintings by Picassoq.e) d/w1y5+0 s e.eluvgmy hfel0xl ), 5 digzr/0jdzqyy+ /x .7em fferent paintings by Van Gogh, and 3 different paintings by Rembr/xd zz+7y/y0.gqrj emandt. The curator of the museum wants to hold an exhibition in a hall that can only display a maximum of 7 paintings at a time.
The curator wants to include at least two paintings from each artist in the exhibition.
1. Given that 7 paintings will be displayed, determine how many ways they can be selected.
2. Find the probability that more Rembrandt paintings will be selected than Picasso paintings or Van Gogh paintings.
