Question

Please Help!! How many 3-digit codes using the digits 0-9 are possible if repetitions are allowed?

Answer 1

Thank you

Answer 2

But how did you know what to multiply?

Answer 3

Ok, just getting into that now. Thank you

Answer 4

Luis Rivera's answer seems incorrect (as repetition is allowed) the correct answer is \( 9 \times 10 \times 10 = 900 \).

Answer 5

are leading zeros permitted?

Answer 6

I assumed leading zeros are not permitted since in general sense that will not be a 3 digit number.

Answer 7

but it says 3 digit code not 3 digit number

Answer 8

if you allow leading zeros then there are \(10^3=1000\) possibilities

Answer 9

Okay, if the leading zero is allowed then you have to add 100 more numbers to the previous 900.

Answer 10

\[ 10 \times 10 \times 10 \]

Answer 11

@Luis Rivera
?

Answer 12

Yes, that last comment doesn't make any sense.