The average of the marks of 11 students in a class is 36. If the marks of each student are doubled, find the new average?  Answers
A) 69
B) 70
C) 71
D) 72
E) 75
Sum of the marks for the 11 students = 11 * 36= 
<gadget id="calculator">11 * 36</gadget>
<output>396</output>
396. The marks of each student are doubled, the sum also will be doubled.   The new sum= 396 * 2= 
<gadget id="calculator">396 * 2</gadget>
<output>792</output>
792. So, the new average= 792/11= 
<gadget id="calculator">792/11</gadget>
<output>72</output>
72.   ANSWER:72
<result>D</result>
The average of the marks of 11 students in a class is 36. If the marks of each student are doubled, find the new average?