Both numerator and denominator approach infinity as n → ∞, but here we have no corresponding function for use with l'hospital's rule (x! is not defined when x is not an integer.) let's write out a few terms to get a feeling for what happens to an as n gets large

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?