How many 3 digit numbers are odd?
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0
My attempt: 100-999 3 -digit integers, 900/2=450 odd numbers.
Answered by
1
Units digit should contain {1,3,5,7,9} = 5; Tens digits can be {0,1,2,3,4,6,7,8,9} = 10 Hundreds digit can be {1,2,3,4,6,7,8,9} = 9.
So the answer is 5 x 10 x 9 = 450
Divyankasc:
U missed {5} in units digit. That's why you answer is incorrect :)
oh. opps. My bad. Will fix it right now
But the answer should be 450 ..
Let me check
Yeah! Got! Ten digit can be {0,1,2,3,4,5,6,7,8,9} = 10 not 9
And ones digit should be 9 not 8
oh. I see. Thank you
:)
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