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If you are 9th person in a queue starting from one end and 11th from another end, what is the number of persons in the queue?
1. 19
2. 21
3. 20
4. 18

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Correct Answer - Option 1 : 19

Rule: Total number of persons in a queue = Position of a person from one end + position of a person from another end - 1 

Therefore,

total number of persons in a queue = 9 + 11 - 1 = 19

Hence, 19 is correct.

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