Probability question?

Question

8 chips in bowl, 3 which has the number one, 2 which have the number 2 and 3 which has the number 3. the probablility of drawing each chip at random is 1/8. let random variable X is S={1,2,3} finda the probablility assignments for these three outcomes and find the mean and variance for these probablility assignments.

I am confuse as to how to approach and solve this question thanks for any help.

Answer 1

X . . . P . . XP (ΔX^2)P
1 0.375 0.375 0.375
2 0.250 0.500 0.000
3 0.375 1.125 1.125
6 1.000 2.000 1.500
m = 2.000
var. = 0.25