In the inspection of a fabric produced in continuous rolls, the number of imperfections per yard is a random variable having the Poisson distribution with λ = 0.25. Find the probability that 2 yards of the fabric will have at most one imperfection using
(a) Table II of "Statistical Tables";
(b) the computer printout of Figure 5.
![](https://test.transtutors.com/qimg/9dbfca8f-0635-4533-b255-b447a659ed22.png)