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" If "sum(z=0)^(25){^(oo)C(r)*^(oo)*C(25...

" If "sum_(z=0)^(25){^(oo)C_(r)*^(oo)*C_(25-r)}=K(^(50)C_(25))" If so "K" Is equal "

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if sum_(r=0)^(25).^(50)C_(r)(.^(50-r)C_(25-r))=k(.^(50)C_25) , then k equals:

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If Sigma_(r=0)^(25) (""^(50)C_(r)""^(50-r)C_(25-r))=K(""^(50)C_(25)) , then K is equal to

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If sum_(r=0r=0)^(n){(C(n,r-1))/(C(n,r)+C(n,r-1))}^(3)=(25)/(24)