Thread: Probability

Assume the the time required to download a file from the Internet is exponentially distrubuted with mean equal to 4 minutes. What is the probablity that a download will require at least 2 but not more then 4 minutes. (to five decimal places)?

Originally Posted by sweettea331

Assume the the time required to download a file from the Internet is exponentially distrubuted with mean equal to 4 minutes. What is the probablity that a download will require at least 2 but not more then 4 minutes. (to five decimal places)?

The pdf of the exponential distribution is:

.

Here , and the required probability is:



which you should be able to evaluate.

RonL