document.write( "Question 925723: in an exam student is to answer 10 of 13 questions find the probability that: he must answer the first two question?
\n" ); document.write( "he must answer the first or the second but not both?
\n" ); document.write( "he must answer exactly 3 of the first 5 questions?
\n" ); document.write( "he must answer at least 3 of 5 question?
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Algebra.Com's Answer #561722 by ewatrrr(24785) $\"\"$ $\"About$

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13 Questions: 10A, 3(not answered)
\n" ); document.write( "P(answering first two) = $\"%2810%2F13%29%289%2F12%29\"$
\n" ); document.write( "P(first or the second but not both) = $\"%2810%2F13%29%283%2F12%29+%2B+%283%2F13%29%2810%2F12%29\"$
\n" ); document.write( "P(exactly 3 of the first 5 questions) = $\"%2810C3%29%283C2%29%2F13C2%29\"$
\n" ); document.write( "P( 3 0r 4 0r 5) =

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