3 years ago the average age of a class of 6 members was 19 years . a boy have been added , the average age of the class is the same today . what is the age of the boy ? Choose the correct answer:
A) 1
B) 2
C) 3
D) 4
E) 5

Rationale: 6 * 22 = 132 7 * 19 = 133 ` 1 a
Answer: A