The following probability distribution represents the number of bedrooms in a randomly selected US household. To simplify matters, the category "five or more" is replaced by "5" (Source: US Census, American Fact Finder). Calculate the variance of the number of bedrooms per household.

Number of Bedrooms X	P(X)
0	2.3%
1	11.3%
2	26.8%
3	.216%
4	39.7%
5	4.1%

a. 0.017

b. 1.070

c. 1.145

d. 2.917

e. 3.215