The probability distribution of X, the number of imperfections per 10 meters of a synthetic fabric in continuous rolls of uniform width, is given in Exercise 3.13 on page 92 as
x |
0 |
1 |
2 |
3 |
4 |
f(x) |
0.41 |
0.37 |
0.16 |
0.05 |
0.01 |
Find the average number of imperfections per 10 meters of this fabric.