Maria is playing a game with her friends in which she has to crack a 10-letter code that includes on letters, but they can be capital and lowercase. Once you use a letter, you CANNOT use it again. How many different codes are there?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
No explanations have been posted yet. Check back later!