Number greater than 1000 but less than 4000 is formed using the digits 0, 2, 3, 4 repetition allowed

  • Option 1)

    125

  • Option 2)

    105

  • Option 3)

    128

  • Option 4)

    625

 

Answers (1)

As we learnt in

Number of Permutations with repetition -

The number of ways of filling r places where each place can be filled by any one of  n objects.

It is n^{r}

- wherein

Where r\geq 0

 

 See arrangements.

First place can be filled with just 2 or 3.

Correct option is 3.

 


Option 1)

125

This is an incorrect option.

Option 2)

105

This is an incorrect option.

Option 3)

128

This is the correct option.

Option 4)

625

This is an incorrect option.

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