document.write( "Question 1135585: There are 4 students attending a test and 7 teachers available for checking the tests.
\n" ); document.write( "Each student's test is checked by exactly one of these teachers, with each teacher being equally likely to be the one who checks the test.
\n" ); document.write( "The probability that all the 4 papers are checked by exactly 3 teachers is equal to k(6/7)^2. \n" ); document.write( "

Algebra.Com's Answer #753385 by kohkche(3) $\"\"$ $\"About$

You can put this solution on YOUR website!
k = 35/72( Thanks to Ikelyn ). \n" ); document.write( "

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