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Answer

Correct Option is 25

Here is the arrangement as per the question: 

10 people - A – ‘x’ people in between – B - 9 people. 

OR 

10 people – B – ‘x’ people - A - 9 people.

Now, 10 + 1 + x = 17. X = 6. 

Total people other than A and B = 10 + 6 + 9 = 25. 

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