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" Q."16" if "sum(r=0)^(25){[50,C(r)],[" ...

" Q."16" if "sum_(r=0)^(25){[50,C_(r)],[" is equal to "]quad ^(50-r)C_(25-r)}=K(^(50)C_(25))" then "K

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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

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

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

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

If ""^(50)C_(r) = ""^(50)C_(r+2) ,find r.

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""^(m)C_(r+1)+ sum_(k=m)^(n)""^(k)C_(r) is equal to :

If sum_(r=0)^25 {.^50C_r*^(50-r)C_(25-r)}=K(.^50C_25), then K is equal to