There is an interesting Example in real world (From <mathematical modeling 3th>,Ch07): An electronics manufacturer produces a variety of diodes. Quality control engineers attempt to insure that faulty diodes will be detected in the factory before they are shipped .  It is estimated that 0.3% of the diodes produced will be faulty .  It is possible to test each  diode individually.  It is also possible to place a number of diodes in series and test the entire group .  If this test fails Read more [...]