Quality Control A manufacturer of widgets has four assembly lines: A, B, C, and D. The percentages..

Quality Control A manufacturer of widgets has four
assembly lines: A, B, C, and D. The percentages of output produced by the lines
are 30%, 20%, 35%, and 15%, respectively, and the percentages of defective
units they produce are 6%, 3%, 2%, and 5%. If a widget is randomly selected
from stock, what is the probability that it is defective?