Expression 1: "y" equals Start sum from "p" equals 1 to 3, end sum, left parenthesis, Start sum from "n" equals 0 to 2, end sum, left parenthesis, StartFraction, nCr left parenthesis, 3 , "p" , right parenthesis times nCr left parenthesis, 37 minus "x" , 5 minus "p" , right parenthesis Over 658008 , EndFraction times StartFraction, nCr left parenthesis, 3 minus "p" , "n" , right parenthesis times nCr left parenthesis, 35 minus left parenthesis, 3 minus "p" , right parenthesis , 10 minus "n" , right parenthesis Over nCr left parenthesis, 35 , 10 , right parenthesis , EndFraction times left parenthesis, 1 minus left parenthesis, StartFraction, nCr left parenthesis, 25 minus left parenthesis, left parenthesis, 3 minus "p" , right parenthesis minus "n" , right parenthesis , 2 , right parenthesis Over nCr left parenthesis, 25 , 2 , right parenthesis , EndFraction , right parenthesis , right parenthesis , right parenthesis , right parenthesisy=3∑p=12∑n=0nCr3,p·nCr37−x,5−p658008·nCr3−p,n·nCr35−3−p,10−nnCr35,10·1−nCr25−3−p−n,2nCr25,2
1
"x"x
Start sum from "p" equals 1 to 3, end sum, left parenthesis, Start sum from "n" equals 0 to 2, end sum, left parenthesis, StartFraction, nCr left parenthesis, 3 , "p" , right parenthesis times nCr left parenthesis, 37 minus "x" , 5 minus "p" , right parenthesis Over 658008 , EndFraction times StartFraction, nCr left parenthesis, 3 minus "p" , "n" , right parenthesis times nCr left parenthesis, 35 minus left parenthesis, 3 minus "p" , right parenthesis , 10 minus "n" , right parenthesis Over nCr left parenthesis, 35 , 10 , right parenthesis , EndFraction times left parenthesis, 1 minus left parenthesis, StartFraction, nCr left parenthesis, 25 minus left parenthesis, left parenthesis, 3 minus "p" , right parenthesis minus "n" , right parenthesis , 2 , right parenthesis Over nCr left parenthesis, 25 , 2 , right parenthesis , EndFraction , right parenthesis , right parenthesis , right parenthesis , right parenthesis3∑p=12∑n=0nCr3,p·nCr37−x,5−p658008·nCr3−p,n·nCr35−3−p,10−nnCr35,10·1−nCr25−3−p−n,2nCr25,2