gwd 07-33

[ai12345]

At company X senior sales representives visit the home office once every 30 days, and junior sales representatives visit the home office once every 20 days. the number of visits that a junior sales representative makes in a 2-days period is approximately what percent greater than the number of visits of visits that a senior representative makes in the same period?
A.10%
B.25%
C.33%
D.50%
E.67%
答案是D.
想不出來怎麼解....前輩邦邦忙

[simonyu]

題目有key錯，應該是2-year period
不過不影響答案，假設時間區間為t好了
則senior的次數為 t/30
junior為t/20
所求之答案為(t/20-t/30)/(t/30)=1/2=50%......答案D
不管t=2 years or so,都不影響答案

[ai12345]

感謝 simonyu 的解答.謝謝.