Syntax. EXPON.DIST(x,lambda,cumulative)

Definition. This function returns the probabilities of an exponential distributed random variable. Use EXPON.DIST() to model the time between events. For example, you can calculate the probability that a call center will receive a call after three minutes, although the hourly average for incoming calls is three minutes.


  • x (required). The value of the function.

  • lambda (required). The value that is passed.

  • cumulative (required). The logical value. If cumulative is TRUE, the cumulative distribution is returned; otherwise, the probability density function is returned.


If x or lambda isn’t a numeric value, the EXPON.DIST() function returns the #VALUE! error.

If x is less than 0, ...

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