Combinatorics - 3
Probability
Level
2
How many nine-digit numbers have an even sum of their digits?(with repetition)
The answer is 450000000.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
do not click