The average of the marks of 10 students in a class is 40. If the marks of each student are doubled, find the new average?	Options:
A) 78	B) 56	C) 80	D) 27	E) 40
Sum of the marks for the 10 students   = 10 * 40= 
<gadget id="calculator">10 * 40</gadget>
<output>400</output>
400. The marks of each student are doubled, the sum also will be doubled.   The new sum= 400 * 2= 
<gadget id="calculator">400 * 2</gadget>
<output>800</output>
800. So, the new average= 800/10= 
<gadget id="calculator">800/10</gadget>
<output>80</output>
80.   Answer: 80
<result>C</result>
The average of the marks of 10 students in a class is 40. If the marks of each student are doubled, find the new average?