How many integers between 100 and 1000 are there such that their unit digit is odd?  Choose the correct answer.
A) 400 B) 420 C) 500 D) 450 E) 350
900 numbers between - 100 and 1000   Out of which half would be even, half odd.   Number of odd unit digit number = 450.   correct option is 450
<result>D</result>
How many integers between 100 and 1000 are there such that their unit digit is odd?