Find out
Probability
Level
1
How many 1, 2, 3, 4, 5, 6, 7, 8, 9 s are there from 1 to 100?
The answer is 181.
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1 solution
From 1 - 9 , there are 9
From 10 - 19 , there are 19
From 20 - 29 , there are 19
From 30 - 39 , there are 19 ...... and so on
So from 10 to 99, there are (9)(19) = 171
The number 100 has 1. So the total is 9 + 171 + 1 = 181