JEE Math Practice Question
If 20C1 + (22) 20C2 + (32) 20C3 + ..... + (202 ) 20C20 = A(2$$\beta $$), then the ordered pair (A, $$\beta $$) is equal to :
- A.(420, 19)
- B.(420, 18)
- C.(380, 18)
- D.(380, 19)
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