The Avg age of a class of 22 subject areas in 21 years. The avg increased by one when the lecturer’s age also involved. What is the age of the Lecturer?
Choose the correct choice from the following choices:
A) 48 years  B) 45 years  C) 46 years  D) 47 years  E) 44 years
44 years   44 years   Average * Subject Areas = Total Age   So =&gt; 21 years x 22 numbers = 462 years … (1)   =&gt; 22 years x 23 numbers = 506 years … (2)   Therefore Lecturer’s age = 44 yearsqn(2) – 44 yearsqn(1)   = 506 – 462   = 44 Years.
<result>E</result>
The Avg age of a class of 22 subject areas in 21 years. The avg increased by one when the lecturer’s age also involved. What is the age of the Lecturer?