The random variable x is exponentially distributed, where x represents the time it takes for a person to choose a birthday gift. if x has an average value of 25 minutes, what is the probability that x is less than 28 minutes? (do not round until the final step. round your answer to 3 decimal places.)

0.674

Step-by-step explanation:

If the random variable X is exponentially distributed and X has an average value of 25 minutes, then its probability density function (PDF) is

and its cumulative distribution function (CDF) is

So, the probability that X is less than 28 minutes is

f

step-by-step explanation:

f