Then four departments choose two to go to this scenic spot, a total of six kinds, and then the remaining two departments go to one scenic spot. According to the principle of multiplication, there are 3×6×2=36 kinds of * *.
There are three or four roads to go, and the probability of choosing departments for all three scenic spots is 36/8 1=4/9.
2. Choose two scenic spots first, and there are three kinds.
Four departments choose 1 to the first scenic spot (the rest to the second scenic spot), two to the first scenic spot, six, and three to the first scenic spot, four * * * 4+6+4 = 14.
According to the principle of multiplication, the department selection method has just two scenic spots, 3× 14=42.
The probability that just two scenic spots have departments is 42/8 1= 14/27.
(The probability of just one scenic spot being selected is 3/8 1, 36/81+42/81+3/81=1).