Crazy zeroes
Probability
Level
5
How many times does 0 appear in the sequence ?
The answer is 788888889.
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1 solution
the total zero in unit digit no is of form a0 where a is from 1 to 99999999
at ones place a0b where total case =99999990
so on adding them =99999999+99999990+99999900+-------------------
=9*(87654321)
=788888889.