Question

DOES ANYBODY KNOW THIS???

A thief steals an ATM card and must randomly guess the correct 3​-digit pin code from a ​7-key keypad. Repetition of digits is allowed.
The number of possible codes is ?
The probability that the correct code is given on the first try is ?

Answer 1

hmm

3^7 = 6,561

1 in 6,561 chances

OR

7^3 = 2,401

1 in 2,401