What is the sum of all 3 digit positive integers that can be formed using the digits 1, 5, and 8, if the digits are allowed to repeat within a number?	Choose the correct choice from the following options
A) 126  B) 1386  C) 3108  D) 308  E) thirteen thousand nine hundred and eighty six (13986)
This can also be solved by using a formula   Sum of N numbers   With repetition = N ^ ( N - 1 ) * Sum of the Numbers * 111..... N no. of times   With out repetition = ( N - 1 ) ! * Sum of the Numbers * 111.... N no. of times.   Here repetition is allowed, therefore N is 3 ( No. of digits given ) and sum of No is 14.   3^2 * 14 * 111 = 13986. ans:thirteen thousand nine hundred and eighty six (13986)
<result>E</result>
What is the sum of all 3 digit positive integers that can be formed using the digits 1, 5, and 8, if the digits are allowed to repeat within a number?