Two factory plants are making TV panels. Yesterday, Plant A produced 3 times as many panels as Plant B. Three percent of the pan
els from Plant A and 4% of the panels from Plant B were defective. How many panels did Plant A produce, if the two plants together produced 1300 defective panels?
Let us assume the number of panels produced by Plant A = z Let us assume the number of panels produced by Plant B = y Then x = 3y 0.03x + 0.04y = 1300 Multiplying both sides of the second equation by 100, we get 3x + 4y = 130000 Putting the value of x from the first equation in the second equation, we get 3x + 4y = 130000 3(3y) + 4y = 130000 13y = 130000 y = 10000 Then x = 3 * 10000 = 30000 From the above deduction, we can conclude that the number of panels made by Plant A is 30000.
