In an exam 49% candidates failed in English and 36% failed in Hindi and 15% failed in both subjects. If the total number of candidates who passed in English alone is 630. What is the total number of candidates appeared in exam? Choose one:
A) 2000
B) 3000
C) 3500
D) 3800
E) 4000
not fail in english =51%   not fail in hindi =64%   not fail in both =30 %(49+36-15)   pass in english only=51-30= 
<gadget id="calculator">51-30</gadget>
<output>21</output>
21   21/100*x=630   x=3000   ANSWER:3000
<result>B</result>
In an exam 49% candidates failed in English and 36% failed in Hindi and 15% failed in both subjects. If the total number of candidates who passed in English alone is 630. What is the total number of candidates appeared in exam?