# Write the number of 5 digit numbers that can be formed using digits 0, 1 and 2.

Ten thousands’ place (104) can be filled with 1 and 2 i.e. ten thousands’ place can be filled in 2 ways. [as, it cannot be filled with 0, because it will become a 4-digit number then]

From the thousands’ place (103) to the ones’ (100) place can be filled with 0 or 1 or 2, so, 4 places can be filled in 3 ways.

As, the operations are dependent, so, total number of ways

.

The discussion can be shown pictorially as:

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