Suppose that you have a loaded die,where the probability of landing on each number is given by the following:

x 1 2 3 4 5 6

P(X=x) 0.3 0.1 0.1 0.1 0.1 .3

Find the variance of a single roll of the die.

a) 1

b) 4.24

c) 3.5

d) 2.06