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Eleven objects A, B, C, D, E, F, alpha, ...

Eleven objects `A, B, C, D, E, F, alpha, alpha, alpha, beta and beta` are arranged in a row, then the probability that every `beta` has two `alpha` as neighbors is

A

`(1)/(1320)`

B

`(1)/(7920)`

C

`(1)/(110)`

D

`(1)/(660)`

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The correct Answer is:
D
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