Question

In how many attempts a 6 digit code can be guessed

Answer 1

★ PERMUTATION ★

--> Digits --> { 0 , 1 , 2 , 3 , ... , 9 }

--> Since, we are not bound by any particular condition :->
      --> 9 ways of Filling the first place  √√
      --> 9 ways of filling the second place √√
          .    .    .   and so on. till the 6th place √√

And hence, by the *Multiplication Principle* , we note :->

---> Number of attempts required to guess a 6 digit code = 9⁶ √√