Let the probability of the reverse side facing up be p, then 0.5 4× p = 1/24. P=2/3
So the probability of facing up is 1-2/3= 1/3.
(2)x=0 is Ex= 1/24.
X= 1 equals Ex=9/48.
X=2 is Ex= 1/3.
X=3 equals Ex=7/24.
X=4 equals Ex=3/24.
X=5 is Ex= 1/48.