document.write( "Question 759905: Two identical tetrahedral are tossed once. If each face of each tetrahedral is labelled in the manner 2, 3, 4, 5. What is the probability of obtaining a sum equal to 7. \n" ); document.write( "

Algebra.Com's Answer #462286 by Edwin McCravy(20060) $\"\"$ $\"About$

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document.write( "They can fall any of these 16 ways.\r\n" );
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document.write( "(2,2) (2,3) (2,4), (2,5)\r\n" );
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document.write( "(3,2) (3,3) (3,4), (3,5)\r\n" );
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document.write( "(4,2) (4,3) (4,4), (4,5)\r\n" );
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document.write( "(5,2) (5,3) (5,4), (5,5)\r\n" );
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document.write( "The ones that have sum 7 are in red.  There are 4 of them.\r\n" );
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document.write( "So the probability is 4 out of 16 or  or .\r\n" );
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document.write( "Edwin

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