Question

A five digit number is formed using digit 1,3,5,7 and 9 without repeating any are of these. what is the sum of all such possible numbers.
a)277775
b)6666600
c)34445
d)9999900​

Answer 1

Answer:

b)6666600

Step-by-step explanation:

1×3×5×7=120/5=24

so sum of five 5 digit number

24×10000(1+3+5+7+9)+24×1000(1+3+5+7+9)+24×100×(1+3+5+7+9)+24×10×(1+3+5+7+9)+24×1×(1+3+5+7+9)

after solving we get

6000000+600000+60000+6000+600

=6666600

HOPE IT HELPS YOU!