A number lock has 4 dials, each dial has the digits 0, 1, 2,...., .. What is the maximum unsuccessful attempts to open the lock?

A number lock has 3 rings and each ring has 10 digits 0,1,2,...9. Find the maximum number of unsuccessful attempts that can be made by a thief who tries to open the lock without knowing the key code

A number lock has 3 rings and each ring has 9 digits 1, 2, 3,……, 9. Find the maximum number of unsuccessful attempts that can be made by a thief who tries to open the lock without knowing the key code.

A mobile has a pass code of distinct digits. What is the maximum number of attempts one makes to retrieve the pass code ?

A letter lock consists of three rings each marked with 10 different letters. No. of ways to make an unsuccessful attempts to open the lock is

a Letter lock contains 5 rings each marked with four different letters . The number of all possible iunsuccesful attempts to open the lock is

A letter lock has 3 rings and each ring has 5 letters. Determine the maximum number of trails that may be required to open the lock.

A letter lock consists of 4 rings each marked with 10 different letters, the number of ways in which it is possible to make an unsuccessful attempts to open the lock is

A letter lock consists of three rings each marked with 10 different letters. In how many ways it is possible to make an unsuccessful attempt to open the lock?