1.

Find all 8-digit numbers such that the sum of their digits is 14 and each of the digits 0,1,2,3,4 occurs at least once in them.

Answer»


ANSWER :`""^(7)C_(2).(6!)/(3!).+ ""^(7)C_(2).(6!)/(2!.2!) + ""^(7)C_(3) (5!)/(2!).+ ""^(7)C_(1) .(7!)/(3!.2!)`


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