Questions range from basic skills such as making change, calculating tips, and balancing checkbooks to basic probability, algebra, logic, and geometry.
Balancing the military need for firepower against the maritime need for seaworthiness resulted in some compromises that would not pass modern standards for stability.
Product engineers improve the product quality and secure the product reliability by balancing cost of test and test coverage that could impact the production fall-off.
Finally, a number of forms of balancing selection exist, which do not result in fixation, but maintain an allele at intermediate frequencies in a population.