Question

A 4-digit password is a number that begins with a 3 and does not contain a zero or nine. If digits can be repeated, how many possible passwords are there? A) 1,536. B) 512. C) 343

Answer 1

Well , we now the password would be :

3 _ _ _ 

and if there is no 0 and 9, the combination must be between 1 to 8

So the possibility of password would be :

8 x 8 x 8 = 512 possibilities

The answer is option B.

Hope this helps

Answer 2

Answer:

512

Step-by-step explanation:

8*8*8=512

hope that helps