还有几天就考试了，不明白的prep错题麻烦大家帮忙看下
(1)Each employee on a certain task force is either a manager or a director. What percent of the employee on the task force are directore?
1) The average (arithmetic mean)salary of the managers on the task force is $5,000less than the average salary of all employees on the task force.
2)The average (arithmetic mean)salary of the directors on the task force is $15,000 greater than the average salary of all employees on the task force.
key C
(2) If n is a positive interger less than 200 and 14n/60 is an integer, then n has how many different positive prime factors?
2 ， 3。 5。 6。 8。
key 3
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