The average age of 21 students of a class is 21 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years, The age of the 21th student is	Choose one:
A) 164
B) 152
C) 100
D) 182
E) 195
Explanation:   Age of the 21th student = [21 * 21 - (14 * 5 + 16 * 9)] = (378-214)= 
<gadget id="calculator">(378-214)</gadget>
<output>164</output>
164 years.   164nswer: 164
<result>A</result>
The average age of 21 students of a class is 21 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years, The age of the 21th student is