document.write( "Question 1176923: Whooping cough (pertussis) is a highly contagious bacterial infection that was a major cuase of childhood deaths before the development of vaccines. About 80% of unvaccinated children who are exposed to whooping cough will develop the infection, as opposed to only about 5% of vaccinated children.\r
\n" ); document.write( "\n" ); document.write( "A group of 5 vaccinated children at a nursery school are exposed to whooping cough by playing with an infected child. What is the probability that at least one of the 5 children develop an infection? \n" ); document.write( "

Algebra.Com's Answer #805038 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "The probability that at least one of the 5 vaccinated children will develop the infection is the COMPLEMENT \r\n" );
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document.write( "to the probability that NO ONE will develop the infection. \r\n" );
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document.write( "So the answer to the problem's question is  P = 1 -  = 1 -  = 0.2262 = 22.62%.    ANSWER\r\n" );
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