document.write( "Question 249154: In a math class, 12 out of 15 girls are freshmen and 11 out of 15 boys are freshmen. What is the probability that in a randomly selected group of five students from the class, there will be two freshmen girls and three freshmen boys? Express your answer as a decimal to the nearest thousandth. \n" ); document.write( "
Algebra.Com's Answer #181525 by edjones(8007) You can put this solution on YOUR website! nCr = n!/((n-r)!r!) Combination of n things taken r at a time. \n" ); document.write( ". \n" ); document.write( "12C2 twelve frosh girls taken 2 at a time= 66 different combinations. \n" ); document.write( "11C3 eleven frosh boys taken 3 at a time= 165 different combinations. \n" ); document.write( "30C5 Thirty students taken 5 at a time=142506 different combinations. \n" ); document.write( ". \n" ); document.write( "(66*165)/142506 \n" ); document.write( "=.076 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |