The average of the marks of 25 students in a class is 70. If the marks of each student are doubled, find the new average?
Choose the correct choice from the following answers.
A) 140  B) 100  C) 85  D) 160  E) 190
Sum of the marks for the 25 students   = 25 * 70= 
<gadget id="calculator">25 * 70</gadget>
<output>1_750</output>
1750. The marks of each student are doubled, the sum also will be doubled.   The new sum= 1750 * 2= 
<gadget id="calculator">1750 * 2</gadget>
<output>3_500</output>
3500. So, the new average= 3500/25= 
<gadget id="calculator">3500/25</gadget>
<output>140</output>
140.   140nswer:140
<result>A</result>
The average of the marks of 25 students in a class is 70. If the marks of each student are doubled, find the new average?