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  4. The number of five digits numbers that can be formed without any restriction is

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Q. The number of five digits numbers that can be formed without any restriction is

ManipalManipal 2019

Solution:

Since, total number of numbers $1$ to $5$ digits are $99999$ and total number of numbers $1$ to $4$ digits are $9999$ . Hence, the total number of numbers of exactly $5$ digits $=99999-9999=90000$