A factory finds that 3% of its manufactured parts are defective. In a batch of 2,000 parts, how many parts would be expected to be…

The expected number of defective parts is the defect rate times the batch size: $0.03 \times 2000 = 60$, choice B. Convert 3% to the decimal 0.03 before multiplying. Choice A (3) treats 3% as 3 parts regardless of the batch. Choice C (600) corresponds to 30%, which results from using 0.3 instead of 0.03. Choice D (6) corresponds to 0.3% and results from moving the decimal point too far. A quick check: 1% of 2,000 is 20, so 3% is $3 \times 20 = 60$.