document.write( "Question 1117242: Find the number of ways of selecting 3 prefects in a class of 15 boys and 10 girls if one of the prefect must Be girl. \n" ); document.write( "
Algebra.Com's Answer #732249 by Fombitz(32388)\"\" \"About 
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One must be a girl so one position has 10 choices.
\n" ); document.write( "The remaining positions have 24 choices (10+15-1).
\n" ); document.write( "\"N=10%2A24%2A23\"
\n" ); document.write( "\"N=5520\"
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