document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=578018>Question 578018</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question:  suppose that the probability that a student will pass a math test is four-fifths, and that the students taking the test are all independent of one another.  what is the probability that at least one student will pass the test.<BR>\n" );
document.write( "Answer:  .99840 </SPAN>\n" );
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document.write( "The p(at least one student passing) = 1 - p(all students fail)\r<BR>\n" );
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document.write( "assuming 4 students like last time:\r<BR>\n" );
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document.write( "p(all students fail) = (1/5)^4 = .0016\r<BR>\n" );
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document.write( "p(at least one student passing) = 1 - .0016 = 0.99840\r<BR>\n" );
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document.write( "D<BR>\n" );
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