The following data were obtained from a survey of college students. The variable X represents the number of non-assigned books read during the past six months.
x |
0 |
1 |
2 |
3 |
4 |
5 |
P (X=x) |
0.20 |
0.25 |
0.20 |
0.15 |
0.10 |
0.10 |
What is the expected value of X?
A. 2.0
B. 3.65
C. 1.20
D. 6.25