Question

0.05% of all tax returns filed electronically contain errors, but 20% of all tax returns filed manually contain errors. If 3.3 million tax returns are filed each way, how many more manually filed returns containing errors will there be than electronically filed returns containing errors?
a.
330,825
b.
643,500
c.
321,750
d.
658,350

Answer 1

Electronic errors: 3,300,000 × 0.0005 = 1,650
Manual errors: 3,300,000 × 0.20 = 660,000
Difference: 660,000 − 1,650 = 658,350

Answer: d. 658,350