The average age of 30 students of a class is 20 years. Out of these, the average age of 10 students is 16 years and that of the other 19 students is 22 years. The age of the 30th student is:  Choose the correct choice from the following choices
A) 22 years	B) 24 years	C) 15 years	D) 16 years	E) None of these
Explanation :   Age of the 30th student = [30 x 20 - (10 x 16 + 19 x 22)] = (600 - 278) = 22 years.   22 yearsnswer : 22 years
<result>A</result>
The average age of 30 students of a class is 20 years. Out of these, the average age of 10 students is 16 years and that of the other 19 students is 22 years. The age of the 30th student is: