Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. {2,5,47,11,13,48,39,36}

A). 18 B). 324.9 C).25.1 D). 24.5

I got 19.3 but it is not one of the multiple choices, am I doing it wrong?

This site indicates you're right.

http://easycalculation.com/statistics/standard-deviation.php