X- 3, 4 ,5 ,6 ,7 ,9
P-0.2, 0.1 ,0.25, 0.05, 0.4
choices are
a)6.2
b)5.95
c)6.05
d)5.6
just take the sum of each value of X time it's probability of occurrence.
3(0.2) + 4(0.1) + ... + 9(0.4)
We have more data values than associated probabilities....???
+125 
