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Two factory plants are making TV panels. Yesterday, Plant A produced 9,000 panels. Three percent of the panels from Plant A and 10% of the panels from Plant B were defective. How many panels did Plant B produce, if the overall percentage of defective panels from the two plants was 7%?

Respuesta :

Answer:

12000

Step-by-step explanation:

Number of defective panel from plant a = [tex]9000\cdot.03[/tex] = 270

let b = number of panels that plant b made

[tex].1b\ +\ 270\ =\ .07\left(9000+b\right)[/tex]

[tex].1b\ +\ 270\ =\ 630+.07b[/tex]

[tex].03b=360[/tex]

[tex]b=\frac{360}{.03} = 12000[/tex]

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