If it is assumed that 80 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 option:	A) 375	B) 420	C) 480	D) 500	E) 600
Minimum no of mail to be sent for getting 300 responses at 80%   = 300/0.8= 
<gadget id="calculator">300/0.8</gadget>
<output>375</output>
375   Option 375
<result>A</result>
If it is assumed that 80 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?