Question

Q.8) What is the sum of all four digit numbers formed by using the digits 0, 1, 2, 3 only once
in each numbers ?
(1) 39996
(2) 36664
(3) 26664
(4) 38664​

Answer 1

Answer:

What is the sum of all 4-digit numbers that can be formed using the digits 1,2,3,4 where repetition of digits is allowed? 1. Sum of all the numbers which can be formed by using the digits without repetition is: (n-1)! *(sum of the digits)*(111…..n times).