document.write( "Question 374877: If you have numbers from 1 to 999 in a bag and you pull out 10 numbers, what are the odds that 7 of those numbers will be from 700 to 999? Is there a formula for figuring this out and if there is can you send it to me? Thanks for your help. Pam \n" ); document.write( "
Algebra.Com's Answer #266653 by edjones(8007) You can put this solution on YOUR website! nCr=Combination of n things taken r at a time=n!/((n-r)!r!) \n" ); document.write( "(300C7 * 699C3)/999C10 = .0088 = 88/10,000 Probability that 7 of those numbers will be from 700 to 999. \n" ); document.write( "10000-88=9912 \n" ); document.write( "Odds against 7 of those numbers will be from 700 to 999 = 9912 to 88 or 113 to one. The odds in favor are the reverse, one to 113. \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |