Answer:
22
Explanation:
first find the total age of the women in the office which is 12 X 22 = 264. then find the total age of men in their office which is 24 X 3 = 72. add those numbers together to get 336 ( total people in both offices). to find the mean of that, divide 336 by 15 to get 22.4 and that rounded to the nearest year is 22.