A test paper has 10 questions each worth 4 marks. While taking the test, a student realises that he has attempted questions worth 16 marks. Assuming that whatever question he attempts is completely correct, how many more questions should he attempt so that he is able to secure 90 percent marks?	Choices:
A) 4 B) 5 C) 6 D) 7 E) 8
Since the test paper has 10 questions each worth 4 marks, the maximum marks he can get is 40.   His aim is to secure 90 % marks, this means he wants to secure 90% of 40 = 36 marks.   Out of the 36 marks, he has already attempted questions worth 16 marks, so he should attempt questions worth   36 - 16= 
<gadget id="calculator">  36 - 16</gadget>
<output>20</output>
20 more marks.   As every question is worth 4 marks, so to secure 20 more marks he should attempt (20/4)= 
<gadget id="calculator">(20/4)</gadget>
<output>5</output>
5 more questions.   Ans 5
<result>B</result>
A test paper has 10 questions each worth 4 marks. While taking the test, a student realises that he has attempted questions worth 16 marks. Assuming that whatever question he attempts is completely correct, how many more questions should he attempt so that he is able to secure 90 percent marks?