Vinay made a Password that consists of 3 digits. None of the digits are the same. How many possible passwords did Vinay choose from? Please explain how to solve.

Answer 1

There are 9 possible numbers for the first number. There are 8 possible numbers for the second number since one number has been picked. For the third number there are 7 possible numbers.

9*8*7=504

Answer 2

Thx, I just realized how to solve it, but I think the first number has to be 10 then 9 and then 8 if it was including zero, which equals 720. And this question was multiple choice so i was confused to why 504 was not there. But thanks again for helping me understand :)

Answer 3

Yes, you are right. I was thinking 1-9. I forgot about 0.

Answer 4

thx so much!

Answer 5

So how do i do the math?

Answer 6

oh wait nvm

Answer 7

You would do 10*9*8 for the answer of 720