In a queue at a ticket counter, Ajay is 7th from the left and Vinay is 9th from the right. They interchange their positions. Now Ajay becomes 11th from the left. How many people are there in the row?
A
18
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B
19
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C
20
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D
Insufficient data
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E
None of these
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Solution
The correct option is B 19
Total number of people in the row = 11 + 9 - 1 = 19