0 votes 0 votes What is the sum of all $5-$digit numbers possible using with the numbers $ 1,3,5,7,9$(Repetition is not allowed)? $A)6666660$ $B)6666600$ $C)6666666$ $D)6666606$ Quantitative Aptitude general-aptitude combinatory + – Lakshman Bhaiya asked Oct 29, 2018 edited Oct 29, 2018 by Lakshman Bhaiya Lakshman Bhaiya 695 views answer comment Share Follow See all 9 Comments See all 9 9 Comments reply Show 6 previous comments Utkarsh Joshi commented Oct 29, 2018 reply Follow Share because digits can repeat.as i said above. 0 votes 0 votes Lakshman Bhaiya commented Oct 29, 2018 reply Follow Share actually, I missed the question, now I edit the question,see again 0 votes 0 votes Utkarsh Joshi commented Oct 29, 2018 reply Follow Share Okay, now option B is correct. :) 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes The sum of all ‘n’ digit numbers that can be formed by using all ‘n’ non-zero digits at a time = $(n-1)!*(sum of the digits)*(1111...n times)$ $= (5-1)!*(1+3+5+7+9)*(11111)$ $= (24)*(25)*(11111)$ $= 6666600$ Hence, option B. DGR answered Jun 9, 2022 DGR comment Share Follow See all 0 reply Please log in or register to add a comment.