A candidate who gets 20% of the marks fails by 40 marks. But another candidate who gets 30% marks gets 20 marks more than necessary for passing. Find the number of marks for passing?  Choose the correct choice:
A) 100 Marks
B) 200 Marks
C) 280 Marks
D) 160 Marks
E) 827 Marks
20% ------------ 40   30% ------------ 20   ----------------------   10% ------------- 60   20% -------------- 120   120 + 40= 
<gadget id="calculator">120 + 40</gadget>
<output>160</output>
160 Marks   Answer:160 Marks
<result>D</result>
A candidate who gets 20% of the marks fails by 40 marks. But another candidate who gets 30% marks gets 20 marks more than necessary for passing. Find the number of marks for passing?