The mean age of 6 women in an office is 24 years old. The mean age of 9 men in an office is 27 years old.
What is the mean age (nearest year) of all the people in the office?

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?