Question

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

• A. 990000
• B. 10000
• C. 90000
• D. None of these

Answer 1

Answer: (C)

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 $=99999-9999=90000.$