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Answer 1

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.

Answer 2

Answer:

Unsuccessful attempt=1000-1=999Answer

Step-by-step explanation:

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