In the diagram, what is the ratio of patterned circles to plain circles?
Four arrays of circles are represented. First array has a plain circle. Second array has 4 patterned circles and 1 plain circle. Third array has 1 patterned circle and 4 plain circles. Fourth array has a plain circle.

In the diagram what is the ratio of patterned circles to plain circles Four arrays of circles are represented First array has a plain circle Second array has 4 class=