A machine produced 20 defective articles in a batch of 400, then after an overhaul, it produced 10 defective in a batch of 300.. has the machine improved?

from logical reasoning, 5 percent of the first batch was defective and approximately 3 percent of the second batch was defective... am i right?

Question

A machine produced 20 defective articles in a batch of 400, then after an overhaul, it produced 10 defective in a batch of 300.. has the machine improved?

 from logical reasoning, 5 percent of the first batch was defective and approximately 3 percent of the second batch was defective... am i right?

sasogeek · Answer

i think the machine improved...

mertsj · Answer

Yes.  If you are only considering the mathematics of the situation and not the fact that perhaps the human operating the machine was involved in the improvement.