document.write( "Question 1163393: Every year, students decide which four classes to take each semester. They must take two core classes each semester consisting of Math, Science, English, or Social Studies. There are 6 electives to choose from for the remaining two classes. \r
\n" ); document.write( "\n" ); document.write( "Q: How many different class schedules are possible if each course is assigned to one of the four periods?\r
\n" ); document.write( "\n" ); document.write( "I did C(4,2) multiplied by C(6,2) and got 90 as the result but the answer was incorrect.
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Algebra.Com's Answer #787471 by Boreal(15235)\"\" \"About 
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C(4,2) is the first one. There are 6 electives to choose from for the third, and after that, there are 5 electives to choose from for the fourth.
\n" ); document.write( "6*6*5=180.
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