On a lunch menu, a turkey sandwich with a cup of soup is $6.00 and a
half of a turkey sandwich with a cup of soup is $3.75. assuming the half
sandwich costs exactly half as much as the whole sandwich, how much
does the cup of soup cost?

(what is the system using the elimination method)

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected