document.write( "Question 943193: A class consists of 12 girls and 18 boys. A president, vice-president and treasurer are chosen based on the number of votes. Find the probability of selecting a president, vice-president and treasurer where all 3 are different boys from the class. \n" ); document.write( "

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A class consists of 12 girls and 18 boys. A president, vice-president and treasurer are chosen based on the number of votes. Find the probability of selecting a president, vice-president and treasurer where all 3 are different boys from the class.
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document.write( "To get the numerator of the probability,\r\n" );
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document.write( "1. Choose the president any of the 18 boys.\r\n" );
document.write( "2. Choose the vice-president any of the remaining 17 boys.\r\n" );
document.write( "3. Choose the vice-president any of the remaining 16 boys.\r\n" );
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document.write( "Numerator of the probability = 18P3 = 18×17×16\r\n" );
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document.write( "To get the denominator of the probability,\r\n" );
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document.write( "1. Choose the president any of the 30 people.\r\n" );
document.write( "2. Choose the vice-president any of the remaining 29 people.\r\n" );
document.write( "3. Choose the vice-president any of the remaining 28 people.\r\n" );
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document.write( "Denominator of the probability = 30P3 = 30×29×28\r\n" );
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document.write( "Answer:  \r\n" );
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document.write( "That's about 0.2\r\n" );
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document.write( "Edwin

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