Vivek S. answered • 06/27/20

Science Teacher seeking curious minds

Let x be the number of panels produced by B.

Then the number of panels produced by A is 2x.

2% of x is 0.02x panels produced by B are defective.

5% of 2x is 0.1x panels produced by A are defective.

In total 0.12x panels are then defective.

Which means 0.12x = 1320 defective panels.

Solved for x ===> 11000 defective panels produced by B.