Question

A lock consists of three rings each marked with 10 different digits. the number of unsuccessful attempts to open the lock is-

Answer 1

10.
dire consequences

Answer 2

Hey there!

Q. 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?

Solution :

There are 3 rings each marked with 10 different letters.

and, each ring will have 10 choices.

then, Total number of attempts = 10 * 10 * 10 = 1000

There will be 1 successful attempt.

So, Total number of unsuccessful attempts = Total number of attempts - 1

      Total number of unsuccessful attempts = 1000 - 1 = 999

Hence, ways it is possible to make an unsuccessful attempt to open the lock are 999.