If it is assumed that 65 percent of those who receive a questionnaire by mail will respond and 300 responses are needed, what is the minimum number of questionnaires that should be mailed?
Choose the correct answer:
A) 400
B) 420
C) 461.5
D) 500
E) 600

Rationale: "minimum no of mail to be sent for getting 300 responses at 65 % = 300 / 0.65 = 461.5 option c"
Answer: C