Machine–A produces 50% of the total output and Machine-B produces 75% of the total output. An average of nine units out of a thousand goods manufactured by Machine-A and one unit of 500 units produced by Machine-B prove to be defective. What is the probability that a unit chosen at random from the total daily output of the factory is defective? Choose the correct option: A) 0.07 B) 0.06 C) 0.0048 D) 0.04 E) 0.05
Suppose machine A produce 1000 units   total defective = 9   Machine B then produces=1500 units   total defective=3   probability=12/2500= 
<gadget id="calculator">12/2500</gadget>
<output>3/625 = around 0.0048</output>
0.0048   Answer : 0.0048
<result>C</result>
Machine–A produces 50% of the total output and Machine-B produces 75% of the total output. An average of nine units out of a thousand goods manufactured by Machine-A and one unit of 500 units produced by Machine-B prove to be defective. What is the probability that a unit chosen at random from the total daily output of the factory is defective?