An integer from 100 to 999 inclusive,is to be chosen at random. what is probability that the number chosen will have 0 as at least
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There are 900 integers in the set 100-999. None of them will have a leading digit of zero, so we need to think about how many have "0" in the tens or units place. Take from 100-199:
100-109 (9 sep. numbers)
110, 120, 130, 140... 180, 190 (9 sep. numbers)
18 numbers in total in that first hundred.
This will be repeated for each of our hundreds:
18 from 200-299
18 from 300-399
100-109 (9 sep. numbers)
110, 120, 130, 140... 180, 190 (9 sep. numbers)
18 numbers in total in that first hundred.
This will be repeated for each of our hundreds:
18 from 200-299
18 from 300-399
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18 in one hundred.. so on..
Total = 180
Total = 180
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