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?

Answer 1

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

Answer 2

10*9*8*7*6

Answer 3

uh... hu's rite?

Answer 4

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

Answer 5

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

Answer 6

there are 10 digits including 0

Answer 7

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

Answer 8

Yes.

Answer 9

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

Answer 10

It is a permutation because order matters.

12345 is different from 54321

Answer 11

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

Answer 12

that's what I got :)

you're welcome

Answer 13

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

Answer 14

thank you. you too :)