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How many number of observations will be present in the output dataset when the below code is run the input dataset shown in the screenshot?</p>

 

proc sort data=class out=sorted;

    by sex;

run;

 

proc summary data=sorted;

    by sex;

    var age;

    output out=stats01 n=n mean=mean;

run;

  2

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  3

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  19

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   0

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