Question

A panel containing four ​on-off switches in a row is to be set. assuming no restrictions on individual​ switches, use the fundamental counting principle to find the total number of possible panel settings.

Answer 1

Four switches may be modeles as:

_ _ _ _, where you can put one of two marks (off or on) on any _.

So, the number of different ways will be 2 * 2 * 2 * 2 = 16

Answer: 16 possible settings.