The number of six digit numbers which have sum of their digits as an odd integer, is

Question

The number of six digit numbers which have sum of their digits as an odd integer, is (A) 45000 (B) 450000 (C) 97000 (D) 970000

Tardigrade Admin · Accepted Answer

For the first place we have nine choices. For each of the next four places, we have 10 choices. At this stage we add the numbers already selected and choose the digit at unit’s place in 5 ways.

Q. The number of six digit numbers which have sum of their digits as an odd integer, is

45000

450000

97000

970000

For the first place we have nine choices. For each of the next four places, we have 10 choices. At this stage we add the numbers already selected and choose the digit at unit’s place in 5 ways.