The average of 35 students in a class is 15 years. The average age of 25 students is 13. What is the average age of remaining 10 students? Choose the correct option: A) 17 years B) 18 years C) 19 years D) 20 years E) 21 years
Sum of the ages of 14 students   = (15 * 35) - (13 * 25) = 525 - 325= 
<gadget id="calculator">525 - 325</gadget>
<output>200</output>
200   Required average= (200/10)= 
<gadget id="calculator">(200/10)</gadget>
<output>20</output>
20 years.   Answer:20 years
<result>D</result>
The average of 35 students in a class is 15 years. The average age of 25 students is 13. What is the average age of remaining 10 students?