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If 20 C1 + (2^2) 20 C2 + (3^2) 20 C3 + ..... + (20^2 ) 20 C20 = A(2^β ), then the ordered pair (A, β) is equal to :

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If  20C1 + (22) 20C2 + (32) 20C3 + ..... + (202 ) 20C20 = A(2β ), then the ordered pair (A, β) is equal to :

(1) (420, 19) (2) (420, 18) (3) (380, 18) (4) (380, 19)

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Correct option  (2) (420, 18) 

Explanation:

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