if n objects are arranged in a row then ...

if n objects are arranged in a row then the number of ways of selecting three of these objects so that no two of them are next to each other is

`{(n-2)(n-3)(n-4)}/6`

`.^(n-2)c_3`

`.^(n-3)c_3+^(n-3)c_2`

none of these

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The correct Answer is:

A, B, C

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