Question:
In a row of students, A is 12th from the left and B is 17th from the right. If there are 30 students in the row, how many students are between A and B?
In a row of students, A is 12th from the left and B is 17th from the right. If there are 30 students in the row, how many students are between A and B?
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If (Left + Right) < Total, there is no overlap. If (Left + Right) > Total, there is overlap.
Updated On: Jun 26, 2026
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The Correct Option is B
Solution and Explanation
Step 1: Concept
$\text{Total} = (\text{Position of A from Left}) + (\text{Position of B from Left}) + \text{Students between}$. Alternatively: $\text{Between} = \text{Total} - (\text{Left Position} + \text{Right Position})$.
Step 2: Analysis
- Position of A = 12 (Left). - Position of B = 17 (Right). - Sum of positions = $12 + 17 = 29$.
Step 3: Calculation
- Total students = 30. - Students between = $30 - 29 = 1$. Final Answer: (2)
$\text{Total} = (\text{Position of A from Left}) + (\text{Position of B from Left}) + \text{Students between}$. Alternatively: $\text{Between} = \text{Total} - (\text{Left Position} + \text{Right Position})$.
Step 2: Analysis
- Position of A = 12 (Left). - Position of B = 17 (Right). - Sum of positions = $12 + 17 = 29$.
Step 3: Calculation
- Total students = 30. - Students between = $30 - 29 = 1$. Final Answer: (2)
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