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If m denotes the number of 5 digit numbe...

If m denotes the number of 5 digit numbers if each successive digits are in their descending order of magnitude and n is the corresponding figure, when the digits are in their ascending order of magnitude then (m-n) has the value (

A

`2.^(10)C_(5)`

B

`.^(10)C_(4)`

C

`.^(1)C_(2)`

D

`.^(1)C_(5)`

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The correct Answer is:
A
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