[問題] 門外漢想請問各位高手一題問題><"
各位高手好
小女子實在沒有這方面的基礎 面對這題問題 完全不知道該如何下手...
不知道是否有人能夠替我詳細解答呢?
若有高手願意幫忙 小的願意包個兩千p幣的紅包給大大
表達我的謝意>"< 這已經是我所有的財產了 還希望大大們不要嫌禮物太輕...orz
非常謝謝!!
The Lower Colorado River Authority (LCRA) has been studying congestion
at the boat-launching ramp near Mansfield Dam. On weekends, the arrival rate
averages 5 boaters per hour, Poisson distributed. The average time to launch
or retrieve a boat is 10 minutes, with negative exponential distribution.
Assume that only one boat can be launched or retrieved at a time.
a. The LCRA plans to add another ramp when the average turnaround
time (i.e., time in the system) exceeds 90 minutes. At what average arrival
rate per hour should the LCRA begin to consider adding another ramp?
b. If there were room to park only 2 boats at the top of the ramp in
preparation for launching, how often would an arrival find insufficient
parking space?
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