Question 1002017
.
Two factory plants are making TV panels. Yesterday, Plant A produced twice as many panels as Plant B. 
Four percent of the panels from Plant A and 3%of the panels from Plant B were defective. 
How many panels did Plant B produce, if the two plants together produced 660 defective panels?
~~~~~~~~~~~~~~~~~~~~~~~~~~~



        Calculations and the answer in the post by @mananth are incorrect

        His check is incorrect too - so, his check skipped the wrong answer.


        I came to bring a correct solution.



Let B produce x panels
Then A produces 2x panels
Four percent of the panels from Plant A and 3%of the panels from Plant B were defective.
0.04(2x) +0.03x = 660
0.08x +0.03x = 660
0.11x = 660
/0.11
x = 660/0.11
x= 6000
Panels produced by B are 6000.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>ANSWER</U>
CHECK
0.04(2*6000) + 0.03(6000) = 660.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;! correct !


Solved correctly.