Answer:
Explanation:
Alright, lets get started.
Plant A produced 9000 panels.
Suppose plant B produced x panels.
Number of defective panels plant A produced =

Number of defective panels plant B produced =

Total defective panels =

We are given that, overall percentage of defective panels from the two plants was 4%.



Cross multiplying


hence plant B produced 6000 panels. : Answer
Hope it will help :)