The average age of class of 20 students is 20 years. If the teacher's age is included the average increases by 1. What is the age of the teacher?

The average age of class of 20 students is 20 years. If the teacher's

1.	The average age of class of 20 students is 20 years. If the teacher's age is included the average increases by 1. What is the age of the teacher?
A.	27
B.	32
C.	41
D.	48
Answer» D. 48