Samples of emissions from three suppliers are classified for
conformance to air-quality specifications. The results from
100 samples are summarized in the table below. Now a sample is
selected at random. What is the probability that the selected
sample conforms to specifications or that it is from Supplier
1?
Conforms
Yes
No
Supplier 1
22
8
Supplier 2
25
5
Supplier 3
30
10
2. In the same context as that of Question 1, now a
sample is selected at random and we immediately see that this
selected sample does conform to air-quality
specifications. With this information regarding the selected
sample revealed, what is the probability that this sample is
from Supplier 1? Please keep two digits past decimal points in your
numerical answer.