1.

There are `(n+1)`white and `(n+1)`blackballs, each set numbered `1ton+1.`The numberof ways in which the balls can be arranged in a row so that the adjacentballs are of different colors isa. `(2n+2)!`b. `(2n+2)!xx2`c. `(n+1)!xx2`d. `2{(n+1)!}^2`A. `(2n+2)!`B. `(2n+2)!xx2`C. `(n+1)!xx2`D. `2{(n+1)!}^(2)`

Answer» Correct Answer - D


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