Question 1138557
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In 12*11*10*9 = 11880 ways.      <U>ANSWER</U>


<U>Explanation</U> :


Any of 12 persons at the 1-st position.

Any of 11 remaining persons at the 2-nd position.

Any of 10 remaining persons at the 3-rd position.

Any of  9 remaining persons at the 4-th position.
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