document.write( "Question 1177246: The Red Cross honors and recognizes its best volunteers from time to time.
\n" ); document.write( "One of the Red Cross offices has received 12 nominations for the next group
\n" ); document.write( "of 4 volunteers to be recognized. Eight of these 12 nominated volunteers are
\n" ); document.write( "females. If the Red Cross office decides to randomly select 4 names out of
\n" ); document.write( "these 12 nominated volunteers, find the probability that of these 4
\n" ); document.write( "volunteers
\n" ); document.write( "a. exactly 3 are females
\n" ); document.write( " b. exactly 1 is female
\n" ); document.write( "c. at most 1 is female \n" ); document.write( "

Algebra.Com's Answer #805651 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Hi\r\n" );
document.write( "12 people: 8F and 4M\r\n" );
document.write( "select 4 names:  12C4 all the ways this can be done.\r\n" );
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document.write( "P(exactly 3 are females) =  (8C3)(4C1)/(12C4)\r\n" );
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document.write( "P(exactly 1 is female) = (8C1)(4C3)/(12C4)\r\n" );
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document.write( "P(at most 1 is female) = 1- P(no females) = 1 - (4C4)/(12C4)\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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