In the exam the average was found to be p mark. After deducting typographical error the average marks of 94 student reduced from 84 to 64 . Due to this the average came down by 18.8 marks. What was the number of students who took the exam?
Pick one:
A) 100
B) 120
C) 110
D) 130
E) 160
Explanation :   Number of student = (84-64) * 94/18.8= 
<gadget id="calculator">(84-64) * 94/18.8</gadget>
<output>100</output>
100   100nswer : 100
<result>A</result>
In the exam the average was found to be p mark. After deducting typographical error the average marks of 94 student reduced from 84 to 64 . Due to this the average came down by 18.8 marks. What was the number of students who took the exam?