189.Each employee on a certain task force is either a manger or
a director. What percent of the employees on the task force are directors? 1) The average salary of the mangers on the task force is $5000 less than the average of all employees on the task force. 2) The average salary of the directors on the task force is $15000 greater than the average salary of all employees on the task force. Ans. C 谢谢！ | 
