1.

How many numbers between 5000 and 10000 can be formed using the digits 1,2,3,4,5,6,7,8,9 each digit appearing not more than once in each number?

Answer»

`5xx""^(8P_(3))`
`5xx""^(8)C_(8)`
`5!XX""^(8)P_(3)`
`5xx""^(8)C_(3)xx3!`

Answer :A::D


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