Sun November 25, 2012 By:

How many 1's are there between 1 and 1000?Can u please explain the method of doing this question?

Expert Reply
Sat December 01, 2012
Total number of arrangement of digit in 3 places =10*10*10=1000
total number of digits involved=1000*3=3000
and all the digits are equally likely therfor each one will occur 3000/10=300 times
Therfor number of 1's occuring =300
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