Can someone please help...or else I'll have to do it the hard way... :\
How many different 5-digit zip codes are possible if no digits are repeated?

Question

Can someone please help...or else I'll have to do it the hard way... >:\
How many different 5-digit zip codes are possible if no digits are repeated?

mertsj · Answer

9(8)(7)(6)(5)

chriss · Answer

10*9*8*7*6

lilai3 · Answer

uh... hu's rite?

chriss · Answer

If the number cannot begin with 0, then it is 9*9*8*7*6

anonymous · Answer

there are nine different digits... so...

chriss · Answer

there are 10 digits including 0

lilai3 · Answer

so is it 10 times 9 times 8 times 7 times 6?

chriss · Answer

Yes.

lilai3 · Answer

wait.. so is it suppose to be a comboniation instead of a permutation?

chriss · Answer

It is a permutation because order matters.

12345 is different from 54321

lilai3 · Answer

oh ya.. thank you...:D
the answer is 30240, rite?

chriss · Answer

that's what I got :)

you're welcome

lilai3 · Answer

haf a good rest of da day, sir.... O:D

chriss · Answer

thank you.  you too :)