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If sum(r=0)^25 {.^50Cr*^(50-r)C(25-r)}=K...

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

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if sum_(r=0)^(25).^(50)C_(r)(.^(50-r)C_(25-r))=k(.^(50)C_25), then k equals: (a) 2^(25) (b) 2^(25)-1 (c) 2^(24) (d) 25^(2)

if sum_(r=0)^(25).^(50)C_(r)(.^(50-r)C_(25-r))=k(.^(50)C_25) , then k equals: (a) 2^(25) (b) 2^(25)-1 (c) 2^(24) (d) 25^(2)

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

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

sum_(r=0)^(20).^(50-r)C_6

If sum_(r=1)^(10)r(r-1)10C_(r)=k.2^(9), then k is equal to- -1

" If "C_(r)=^(25)C_(r)" and "C_(0)+5.C_(1)+9.C_(2)+....+(101)*C_(25)=2^(25)k," then "k" is equal to "