The lifetime of an alkaline battery is exponentially distributed with a mean of 20 a) what is the probability that the battery will last between 10 and 15 hours?

  0.1342

Step-by-step explanation:

The cumulative distribution function for exponential distribution is :-

, where is the mean of the distribution.

Given :

Then , the probability that the battery will last between 10 and 15 hours is given by :-

Hence, the probability that the battery will last between 10 and 15 hours = 0.1342

45 minutes

step-by-step explanation:

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