document.write( "Question 1177214: Five white and four black balls are arranged in a row. What is the probability that the end
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Algebra.Com's Answer #805499 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( " 9 balls:  5W and 4Bk  (9! ways of arranging 9 Balls)\r\n" );
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document.write( "I. Reserve one of each color for the end spots...leaving 7 balls\r\n" );
document.write( "The 7 balls can be arrange in 7! ways.\r\n" );
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document.write( "II> P(different colors on both ends = 2*7!/9! (white or black on either end)\r\n" );
document.write( " 2*7!/9!= 2/9*8 = 1/9*4 = 1/36 = .0278\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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