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In a row of people all facing North, Shreya is 11th from the left end. Ravi is 12th from the left end. Ravi is exactly between Shreya and Rahul. If Rahul is 15th from the right end of the line, how many people are there in the row?
29
45
28
27
27
Identify the number of people between Shreya (11th from left) and Ravi (12th from left). Since they are adjacent, there are 0 people between them. The condition 'Ravi is exactly between Shreya and Rahul' implies Shreya, Ravi, and Rahul form a sequence in that order.
Identify the number of people between Shreya (11th from left) and Ravi (12th from left). Since they are adjacent, there are 0 people between them. The condition 'Ravi is exactly between Shreya and Rahul' implies Shreya, Ravi, and Rahul form a sequence in that order.
Analyze Positions
Shreya is at 11th from the left. Ravi is at 12th from the left. Since Ravi is exactly between Shreya and Rahul, the sequence is Shreya (11), Ravi (12), and Rahul (13) from the left end.
Determine Total Count
Rahul is 13th from the left and 15th from the right. The total number of people in a row is calculated as (Left + Right - 1) = (13 + 15 - 1) = 27.
A: 29 is incorrect as it assumes wrong positioning, B: 45 is incorrect, C: 28 is incorrect as it fails to account for the -1 in the total count formula.
D is correct because Rahul is 13th from the left and 15th from the right, resulting in a total of 27 people.
In row problems, always verify the 'exactly between' condition carefully. If positions are consecutive, 'exactly between' implies they are next to each other in sequence.
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