If it is assumed that 60 percent of those who receive a questionnaire by mail will respond and 222 responses are needed, what is the minimum number of questionnaires that should be mailed? Choose the correct choice from the following answers:
A) 280 B) 370 C) 460 D) 550 E) 640

Rationale: "let x be the minimum number of questionnaires to be mailed . 0.6 x = 222 x = 370 the answer is b ."
Answer: B