In the exam the average was found to be p mark. After deducting typographical error the average marks of 64 student reduced from 82 to 62 . Due to this the average came down by 16 marks. What was the number of students who took the exam?
Choose the correct choice from the following answers:
A) 100 B) 80 C) 90 D) 60 E) 160
Explanation :   Number of student = (82-62) * 64/16= 
<gadget id="calculator">(82-62) * 64/16</gadget>
<output>80</output>
80   Answer : 80
<result>B</result>
In the exam the average was found to be p mark. After deducting typographical error the average marks of 64 student reduced from 82 to 62 . Due to this the average came down by 16 marks. What was the number of students who took the exam?