Answer to Question #11783 in Combinatorics | Number Theory for nuvia de latorre

Question #11783

Two floors of a store are connected by two up and down escalators
Floor 1 has 7 people& floor 2 has 12 people
There are always two people occupying each escalator
Question 1 :
If there are always 2 people on each escalator at any one moment, will the amount of people on each floor ever change?
Question 2 :
If there are always 2 people on each escalator at any one moment, will the specific people on each floor ever change ?

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