If X is an exponential random variable with the probability density function ,find E(X).
A) 10
B) 5
C)
D)
E) 1

Name: If X is an exponential random variable with the probability density function ,find E(X). A) 10 B) 5 C) D) E) 1
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Question

​If X is an exponential random variable with the probability density function  ,find E(X). ​
A) ​10 
B) ​5 
C) ​ 
D) ​ 
E) ​1

Quizplus · Accepted Answer

The mean of an exponential distribution with parameter λ is equal to 1/λ. 
Here, the parameter is 1/10, so the mean is 10/1 = 10. Hence, the correct option is (C).

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