The average age of 10 men increases by 2 years when two women are included in place of two men of ages 10 and 12 years. Find the average age of the women?
Choose the correct choice
A) 21
B) 32
C) 30
D) 41
E) 37

Rationale: "10 + 12 + 10 * 2 = 42 / 2 = 21 answer : a"
Answer: A