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

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 has 3 rings each containing 6 different letters. What is the maximum number of false trials that can be made before the lock is opened?

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 number lock contains 4 rings each ring containing 6 numbers . All the possible attempts of opening the lock are made but the lock opens in only one way. The probability for the lock to open is

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 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

The number of five digit even numbers that can be made with the digits, 0, 1, 2 and 3, is