Discussion
Suresh was standing 15th from the front and 25th from the back of a row. How many people were there in that queue?
Answer: A
The number of people in a row is the position from the front plus the position from the back minus one, because the person himself is counted in both positions.
\[ 15 + 25 - 1 = 39 \]
Adding the two positions without subtracting one would give 40, which counts Suresh twice and is the usual wrong answer, and 38 would subtract two. There is no reason to subtract more than the one person who is counted twice. So the queue had 39 people, which is the first option.
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