document.write( "Question 388907: You select at random 2 numbers from 1 to 8. What is the probability that the sum of two numbers selected is 3? Answer should be as a common fraction. \n" ); document.write( "
Algebra.Com's Answer #275316 by edjones(8007)![]() ![]() You can put this solution on YOUR website! 1 and 2 are the only numbers in the group whose sum is 3. \n" ); document.write( "nCr=combination of n things taken r at a time=n!/((n-r)!*r!) \n" ); document.write( "=8!/(6!*2!)=28 \n" ); document.write( "1/28 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |