Question

A letter lock consists of three rings marked with 15 different letters. If n denotes the number of ways in which it is possible to make unsuccessful attempts to open the lock, then

Answer 1

Dear Student,

● Answer -

n = 3374 attempts

◆ Explanation -

Given that letter lock has three rings marked with 15 different letters.

So no of possible combinations is -

x = 15^3

x = 3375

Out of this, one combination will be successful. So no of unsuccessful attempts are -

n = x - 1

n = 3375 - 1

n = 3374 attempts

Hence, no of unsuccessful attempts to open the lock are 3374.

Thanks dear. Hope this helps you...