Answer:
B produced 20000 panels
Step-by-step explanation:
Plant A produced 5000 fewer panels than Plant B did
A = B - 5000 eq1
Two percent of the panels from Plant A and 4% of the panels from Plant B were defective:
0.02A + 0.04B = 1100 eq2
Solving the two equations:
Put value of A from 1 in 2
0.02 (B - 5000) + 0.04B = 1100
0.06B - 100=1100
0.06B = 1200
B = 20000