SOA Exam P Sample Question 588
Study guide: Exam P-1
The lifetimes of light bulbs are independent and exponentially distributed with common mean 1000 hours. A lamp has a single bulb and is continuously on. Each light bulb is replaced immediately after it burns out.
Calculate the standard deviation of the time, in hours, until the failure of the fifth bulb.
- A)
71 - B)
158 - C)
1000 - D)
2236 - E)
5000
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