Question

The keyless entry system in some cars uses a 4-digit keypad. There are 10 possible digits, and the digits can be repeated. How many different combinations are there?

Answer 1

Badges will be awarded.

Answer 2

10*10*10*10

Answer 3

You have 10 choices for 1st digit AND 10 choices for 2nd, AND 10 for 3rd, And 10 for fourth. By the multiplication Principle there are 10*10*10*10 choices
(10000 choices)

Answer 4

I forgot its a multiple choice question and I get to tries. My options are
1. 10
2. 40
3. 10,000
4.40,000
I already chosen 40 but they said it was incorrect. But, thanks for trying! :)

Answer 5

Help, anyone