Question

A five-digit number is formed using digits 1, 3, 5, 7 and 9 without repeateg ally Dile
of them. Select the option that indicates the sum of all such possible numbers.
(1) 6666666 (2) 6666660 (3) 6666600 (4) 6666000​

Answer 1

Explanation:

Sum = 6666600

Total of diff numbers possible = 5! --> 5*4*3*2*1 = 120

Smallest no = 13579

Largest no = 97531

Average of 120 numbers =(13579+97531)/2

Sum of 120 nos = 111110/2 * 120

= 111110*60

= 6666600

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