Melody

Use the calculator on the home page you lazy person.

Thank you Heureka,

I will study your answer :)

NoMathkid,

0^0      makes no sense it is undefined.       

It is not possible to get a mean begger than your data!

Mean is a measure of central tendancy!   It is the same as average.

Yes, any number divided by 1 stays the same.

Also guest you have your permutation and combinations muddled up.

If the letters all must be different then

If order doesn't matter then the answer will be smaller and you use C  (for combinations)      

If order does matter then the answer will be bigger and you use P  (for permutations)

If you swap your answers around then they will be correct.   :)

There are 26 choices for each of the 5 positions so it will be

26*26*26*26*26   = 26^5       = 11 881 376        = 1.1881376 * 10^7

2000^20

You can do this one with minimal help from a calculator

\(2000^{20}\\\\=(2*10^3)^{20}\\\\=2^{20}*10^{60}\\\\=1048576*10^{60}\\\\ =1.048576*10^{66}\)

Just add 558 to both sides :)