On a terrace , it has rained. The terrace is covered with 100 square-shaped tiles, each 50 cm x 50 cm. In total, 1000 raindrops have fallen on the terrace. You then count the raindrops that have fallen on each tile. Considering the tiles individually, what is the expected distribution of the number of drops? How many tiles do you expect to have received 0, 1, 2, 3, ... drops?