Samples of emissions from three suppliers are classified
for conformance to air-quality specifications. The results
from 100 samples are summarized as follows:
Conforms
Yes No
1 22 8
Supplier 2 25 5
3 30 10
Let A denote the event that a sample is from supplier 1, and let
B denote the event that a sample conforms to specifications.
Determine the number of samples in AŒ¿ B, BŒ, and A¾ B.