Tell Whether Each Is Correct and Explain Why or Why

Essay

Tell whether each is correct and explain why or why not.
A) Fund-raiser: "We got two donations of $5000 and two of $1000 each! That's an average of $3000 per donation!"
B) Quality-control trainee: "One shipment had 1% of the items defective, and another shipment had 5% defective. That's an average of 3% defective."