1.

How many times does the digit 3 occurs in natural number from 100 to 1000​

Answer»

Answer:

Number of ways X can be filled = 9 (1–9 numbers excluding 0 as it is a 3 digit number). So, number of times 3 OCCURS in ten's and UNIT's PLACE from 100 to 1000 = 90+81 = 171.



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