( 1): 1/K+2/K+3+4/K/K = 1

Therefore: C = 10.

( 1/2)& lt； Only 1 or 2.

(3)1≤ x ≤ 3p =1102/10 = 0.3 Therefore, in the middle, x = 1, 2,3.

(4)= 3,4

P value = 3/104/10 = 7/10,