A group of students was interviewed for that if it was asked whether or not they speak French and / or English. Among those who speak French, 30 speak English well, while 40 of them do not speak English. If 86% of students do not speak French, how many students were surveyed?  Choose the correct choice from the following answers:
A) 500	B) 450	C) 250	D) 350	E) 525
Number of students who speak French are 30 + 40= 
<gadget id="calculator">30 + 40</gadget>
<output>70</output>
70   Of total students, the percentage of students who do not speak French was 86% --&gt; percentage of who do is 14%   70-------14%   x ------- 100%   x= 70*100/14= 
<gadget id="calculator">70*100/14</gadget>
<output>500</output>
500= number of all students   500nswer is 500
<result>A</result>
A group of students was interviewed for that if it was asked whether or not they speak French and / or English. Among those who speak French, 30 speak English well, while 40 of them do not speak English. If 86% of students do not speak French, how many students were surveyed?