The average of 45 students in a class is 18 years. The average age of 21 students is 16. What is the average age of remaining 14 students?  Choose the correct choice from the following choices
A) 21  B) 16  C) 17  D) 18  E) 19
Sum of the ages of 14 students   = (18* 45) - (18 * 21) = 810 - 378= 
<gadget id="calculator">810 - 378</gadget>
<output>432</output>
432   Required average= (266/23)   = 18 years.   Answer: 18
<result>D</result>
The average of 45 students in a class is 18 years. The average age of 21 students is 16. What is the average age of remaining 14 students?