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In a row of 47 people facing north, Kamu sits 12 th from the left end. If only 12 people sit to the right of Tara, then how many people sit between Kamu and Tara?
19
22
21
20
22
To find the number of people between two individuals in a row, use the formula |Position1 - Position2| - 1. If Position2 is given from the right, convert it to the left first using (Total - RightPosition + 1).
To find the number of people between two individuals in a row, use the formula |Position1 - Position2| - 1. If Position2 is given from the right, convert it to the left first using (Total - RightPosition + 1).
Determine Kamu's position
Kamu is 12th from the left.
Convert Tara's position to the left
If 12 people are to the right of Tara, Tara is at position (47 - 12) = 35th from the left.
Calculate the number of people between them
The number of people between two positions P1 and P2 is |P2 - P1| - 1. Here, |35 - 12| - 1 = 23 - 1 = 22.
A: 19 is incorrect as it ignores the gap formula subtraction. C: 21 is incorrect due to a calculation error of subtracting 1 too many times. D: 20 is incorrect as it fails to account for the total count boundaries correctly.
B is correct because converting Tara's position to 35 from the left and applying the between-gap formula |35-12|-1 results in 22.
Always ensure you are counting positions from the same end (left or right) before subtracting. A common trap is forgetting to subtract 1 after finding the difference between ranks.
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